Deck 2: Organizing and Visualizing Data

Question 1

TABLE 2-1
An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. A representative from a local insurance agency selected a random sample of insured drivers and recorded, X, the number of claims each made in the last three years, with the following results.

Referring to Table 2-1, how many total claims are represented in the sample?

A) 15
B) 50
C) 111
D) 250

Answer 1

111

Question 2

When constructing charts, the following is plotted at the class midpoints:

A) frequency histograms.
B) percentage polygons.
C) cumulative percentage polygon (ogives).
D) all of the above

Answer 2

percentage polygons.

Question 3

Tim was planning for a meeting with his boss to discuss a raise in his annual salary. In preparation, he wanted to use the Consumer Price Index to determine the percentage increase in his real (inflation-adjusted)salary over the last three years. Which of the four methods of data collection was involved when he used the Consumer Price Index?

A) published sources
B) experimentation
C) surveying
D) observation

Answer 3

published sources

Question 4

TABLE 2-2
At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer.

The width of each bar in a histogram corresponds to the

A) differences between the boundaries of the class.
B) number of observations in each class.
C) midpoint of each class.
D) percentage of observations in each class.

Question 5

TABLE 2-4
A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below.

Referring to Table 2-4, what percentage of the respondents rated overall television quality with a rating of 80 or above?

A) 0
B) 4
C) 96
D) 100

Question 6

A type of vertical bar chart in which the categories are plotted in the descending rank order of the magnitude of their frequencies is called a

A) contingency table.
B) Pareto chart.
C) stem-and-leaf display.
D) pie chart.

Question 7

The personnel director at a large company studied the eating habits of the company's employees. The director noted whether employees brought their own lunches to work, ate at the company cafeteria, or went out to lunch. The goal of the study was to improve the food service at the company cafeteria. This type of data collection would best be considered as

A) an observational study.
B) a designed experiment.
C) a random sample.
D) a quota sample.

Question 8

A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the beaches from environmental disasters. Twenty-five hundred Florida residents were surveyed. What type of data collection procedure was most likely used to collect the data for this study?

A) a designed experiment
B) a published source
C) a random sample
D) observational data

Question 9

TABLE 2-3
Every spring semester, the School of Business coordinates a luncheon with local business leaders for graduating seniors, their families, and friends. Corporate sponsorship pays for the lunches of each of the seniors, but students have to purchase tickets to cover the cost of lunches served to guests they bring with them. The following histogram represents the attendance at the senior luncheon, where X is the number of guests each graduating senior invited to the luncheon and f is the number of graduating seniors in each category.

Referring to the histogram from Table 2-3, if all the tickets purchased were used, how many guests attended the luncheon?

A) 4
B) 152
C) 275
D) 388

Question 10

TABLE 2-3
Every spring semester, the School of Business coordinates a luncheon with local business leaders for graduating seniors, their families, and friends. Corporate sponsorship pays for the lunches of each of the seniors, but students have to purchase tickets to cover the cost of lunches served to guests they bring with them. The following histogram represents the attendance at the senior luncheon, where X is the number of guests each graduating senior invited to the luncheon and f is the number of graduating seniors in each category.

Referring to the histogram from Table 2-3, how many graduating seniors attended the luncheon?

A) 4
B) 152
C) 275
D) 388

Question 11

The British Airways Internet site provides a questionnaire instrument that can be answered electronically. Which of the four methods of data collection is involved when people complete the questionnaire?

A) published sources
B) experimentation
C) surveying
D) observation

Question 12

A marketing research firm, in conducting a comparative taste test, provided three types of peanut butter to a sample of households randomly selected within the state. Which of the four methods of data collection is involved when people are asked to compare the three types of peanut butter?

A) published sources
B) experimentation
C) surveying
D) observation

Question 13

TABLE 2-2
At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer.

Referring to Table 2-2, how many regional offices are represented in the survey results?

A) 5
B) 11
C) 15
D) 40

Question 14

TABLE 2-2
At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer.

Referring to Table 2-2, across all of the regional offices, how many total employees were supervised by those surveyed?

A) 15
B) 40
C) 127
D) 200

Question 15

A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year?

A) 14%
B) 44%
C) 54%
D) 86%

Question 16

Which of the four methods of data collection is involved when a person counts the number of cars passing designated locations on the Los Angeles freeway system?

A) published sources
B) experimentation
C) surveying
D) observation

Question 17

Jared was working on a project to look at global warming and accessed an Internet site where he captured average global surface temperatures from 1866. Which of the four methods of data collection was he using?

A) published sources
B) experimentation
C) surveying
D) observation

Question 18

When polygons or histograms are constructed, which axis must show the true zero or "origin"?

A) the horizontal axis
B) the vertical axis
C) both the horizontal and vertical axes
D) neither the horizontal nor the vertical axis

Question 19

A statistics student found a reference in the campus library that contained the median family incomes for all 50 states. She would report her data collection method as

A) a designed experiment.
B) observational data.
C) a random sample.
D) a published source.

Question 20

TABLE 2-1
An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. A representative from a local insurance agency selected a random sample of insured drivers and recorded, X, the number of claims each made in the last three years, with the following results.

Referring to Table 2-1, how many drivers are represented in the sample?

A) 5
B) 15
C) 18
D) 50

Question 21

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 10 calls lasted 30 minutes or more, how many calls lasted less than 5 minutes?

A) 10
B) 185
C) 295
D) 500

Question 22

In a survey, 150 executives were asked what they think is the most common mistake candidates make during job interviews. Six different mistakes were given. Which of the following is the best for presenting the information?

A) a bar chart
B) a histogram
C) a stem-and-leaf display
D) a contingency table

Question 23

Data on the number of credit hours of 20,000 students at a public university enrolled in a spring semester were collected. Which of the following is the best for presenting the information?

A) a pie chart
B) a Pareto chart
C) a stem-and-leaf display
D) a contingency table

Question 24

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.

A) 35
B) 37
C) 39
D) none of the above

Question 25

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more?

A) 0.16
B) 0.24
C) 0.41
D) 0.90

Question 26

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 1,000 calls were randomly sampled, how many calls lasted under 10 minutes?

A) 220
B) 370
C) 410
D) 590

Question 27

Which of the following is appropriate for displaying data collected on the different brands of cars that students at a major university drive?

A) a Pareto chart
B) a two-way classification table
C) a histogram
D) a scatter plot

Question 28

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, what is the width of each class?

A) 1 minute
B) 5 minutes
C) 2%
D) 100%

Question 29

TABLE 2-4
A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below.

Referring to Table 2-4, what percentage of the respondents rated overall television quality with a rating from 50 through 75?

A) 11
B) 40
C) 44
D) 56

Question 30

You have collected information on the market share of five different search engines used by U.S. Internet users in January 2011. Which of the following is the best for presenting the information?

A) a pie chart
B) a histogram
C) a stem-and-leaf display
D) a contingency table

Question 31

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 100 calls were sampled, ________ of them would have lasted 20 minutes or more.

A) 26
B) 16
C) 74
D) none of the above

Question 32

When studying the simultaneous responses to two categorical questions, you should set up a

A) contingency table.
B) frequency distribution table.
C) cumulative percentage distribution table.
D) histogram.

Question 33

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 100 calls were sampled, ________ of them would have lasted less than 15 minutes.

A) 26
B) 74
C) 10
D) none of the above

Question 34

Data on 1,500 students' height were collected at a larger university in the East Coast. Which of the following is the best chart for presenting the information?

A) a pie chart
B) a Pareto chart
C) a side-by-side bar chart
D) a histogram

Question 35

One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data?

A) a Pareto chart
B) a two-way classification table
C) a histogram
D) a time-series plot

Question 36

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 100 calls were randomly sampled, how many calls lasted 15 minutes or longer?

A) 10
B) 14
C) 26
D) 74

Question 37

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, if 100 calls were randomly sampled, ________ of them would have lasted at least 15 minutes but less than 20 minutes

A) 6
B) 8
C) 10
D) 16

Question 38

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

A) 0.10
B) 0.59
C) 0.76
D) 0.84

Question 39

TABLE 2-4
A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below.

Referring to Table 2-4, what percentage of the respondents rated overall television quality with a rating of 50 or below?

A) 11
B) 40
C) 44
D) 56

Question 40

Data on the number of part-time hours students at a public university worked in a week were collected. Which of the following is the best chart for presenting the information?

A) a pie chart
B) a Pareto chart
C) a percentage table
D) a percentage polygon

Question 41

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, the civil suit with the longest wait between when the suit was filed and when it was adjudicated had a wait of ________ months.

Question 42

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, ________ percent of the students in the sample spent the weekend studying and did well on the midterm.

A) 40
B) 50
C) 72.72
D) 80

Question 43

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, the civil suit with the fourth shortest waiting time between when the suit was filed and when it was adjudicated had a wait of ________ months.

Question 44

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, of the students in the sample who went bar hopping the weekend before the midterm, ________ percent did well on the midterm.

A) 15
B) 27.27
C) 30
D) 55

Question 45

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, if the sample is a good representation of the population, we can expect ________ percent of those who did poorly on the midterm to have spent the weekend studying.

A) 10
B) 22.22
C) 45
D) 50

Question 46

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, ________ percent of the cases were adjudicated within the first two years.

Question 47

You have collected data on the approximate retail price (in $)and the energy cost per year (in $)of 15 refrigerators. Which of the following is the best for presenting the data?

A) a pie chart
B) a scatter plot
C) a side-by-side bar chart
D) a contingency table

Question 48

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, if the sample is a good representation of the population, we can expect ________ percent of those who spent the weekend studying to do poorly on the midterm.

A) 10
B) 20
C) 45
D) 50

Question 49

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, if the sample is a good representation of the population, we can expect ________ percent of the students in the population to spend the weekend studying and do poorly on the midterm.

A) 10
B) 20
C) 45
D) 50

Question 50

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, ________ percent of the cases were not adjudicated within the first four years.

Question 51

You have collected information on the consumption by the 15 largest coffee-consuming nations. Which of the following is the best for presenting the shares of the consumption?

A) a pie chart
B) a Pareto chart
C) a side-by-side bar chart
D) a contingency table

Question 52

You have collected data on the number of complaints for six different brands of automobiles sold in the United States in 2006 and in 2010. Which of the following is the best for presenting the data?

A) a contingency table
B) a stem-and-leaf display
C) a time-series plot
D) a side-by-side bar chart

Question 53

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, locate the first leaf, i.e., the lowest valued leaf with the lowest valued stem. This represents a wait of ________ months.

Question 54

Retailers are always interested in determining why a customer selected their store to make a purchase. A sporting goods retailer conducted a customer survey to determine why its customers shopped at the store. The results are shown in the bar chart below. What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience?

A) 35%
B) 50%
C) 65%
D) 85%

Question 55

You have collected data on the responses to two questions asked in a survey of 40 college students majoring in business, What is your gender (Male = M; Female = F)and What is your major (Accountancy = A; Computer Information Systems = C; Marketing = M). Which of the following is the best for presenting the data?

A) a contingency table
B) a stem-and-leaf display
C) a time-series plot
D) a Pareto chart

Question 56

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, of the students in the sample who did well on the midterm, ________ percent went bar hopping the weekend before the midterm.

A) 15
B) 27.27
C) 30
D) 50

Question 57

TABLE 2-6
A sample of 200 students at a Big Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.

Referring to Table 2-6, ________ percent of the students in the sample went bar hopping the weekend before the midterm and did well on the midterm.

A) 15
B) 27.27
C) 30
D) 50

Question 58

You have collected data on the number of U.S. households actively using online banking and/or online bill payment from 1995 to 2010. Which of the following is the best for presenting the data?

A) a pie chart
B) a stem-and-leaf display
C) a side-by-side bar chart
D) a time-series plot

Question 59

In a contingency table, the number of rows and columns

A) must always be the same.
B) must always be 2.
C) must add to 100%.
D) none of the above

Question 60

You have collected data on the monthly seasonally adjusted civilian unemployment rate for the United States from 1998 to 2010. Which of the following is the best for presenting the data?

A) a contingency table
B) a stem-and-leaf display
C) a time-series plot
D) a side-by-side bar chart

Question 61

TABLE 2-10
The histogram below represents scores achieved by 200 job applicants on a personality profile.

Referring to the histogram from Table 2-10, ________ percent of the job applicants scored below 50.

Question 62

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, if a frequency distribution with equal sized classes was made from this data, and the first class was "0 but less than 10," the relative frequency of the last class would be ________.

Question 63

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, if a frequency distribution with equal sized classes was made from this data, and the first class was "0 but less than 10," the cumulative percentage of the next-to-last class would be ________.

Question 64

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, ________ percent of the apartments rented for $600 or more.

Question 65

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, if a frequency distribution with equal sized classes was made from this data, and the first class was "10 but less than 20," the frequency of that class would be ________.

Question 66

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, the relative frequency of the second class is ________.

Question 67

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, if a frequency distribution with equal sized classes was made from this data, and the first class was "0 but less than 10," the frequency of the fifth class would be ________.

Question 68

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, ________ of the 100 members visited the health club no more than 12 times in a year.

Question 69

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, the class midpoint of the second class is ________.

Question 70

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, if a frequency distribution with equal sized classes was made from this data, and the first class was "0 but less than 10," the class midpoint of the third class would be ________.

Question 71

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, ________ percent of the apartments rented for at least $500.

Question 72

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, the percentage of apartments renting for less than $600 is ________.

Question 73

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, ________ of the 100 members visited the health club at least 52 times in a year.

Question 74

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, the person who has the largest leaf associated with the smallest stem visited the facility ________ times.

Question 75

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, if a frequency distribution with equal sized classes was made from this data, and the first class was "10 but less than 20," the cumulative percentage of the second class would be ________.

Question 76

TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town.

Referring to Table 2-9, ________ apartments rented for at least $400 but less than $600.

Question 77

TABLE 2-7
The stem-and-leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.

Referring to Table 2-7, if a frequency distribution with equal sized classes was made from this data, and the first class was "10 but less than 20," the relative frequency of the third class would be ________.

Question 78

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, the person who visited the health club more than anyone else in the sample visited the facility ________ times.

Question 79

TABLE 2-10
The histogram below represents scores achieved by 200 job applicants on a personality profile.

Referring to the histogram from Table 2-10, ________ percent of the job applicants scored between 10 and 20.

Question 80

TABLE 2-8
The stem-and-leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Table 2-8, the person who visited the health club less than anyone else in the sample visited the facility ________ times.