Exam 2: Organizing and Visualizing Variables

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?

SCENARIO 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 Scenario 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_____.

SCENARIO 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 Scenario 2-8,the person who has the largest leaf associated with the smallest stem visited the facility_____ times.

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,_____percent of the 600 owned a portable Blu-ray player.

The larger the number of observations in a numerical data set,the larger the number of class intervals needed for a grouped frequency distribution.

SCENARIO 2-17 The following table presents total retail sales in millions of dollars for the leading apparel companies over a two-year period in the past. Organizing and Visualizing Variables 2-45 -Referring to Scenario 2-17,in general,retail sales for the apparel industry have seen a modest growth between Year 1 and Year 2.

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,if the sample is a good representation of the population,we can expect _____percent of the females in the population will not own a portable Blu-ray player.

SCENARIO 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 3 years,with the following results. -Referring to Scenario 2-1,how many total claims are represented in the sample?

Relationships in a contingency table can be examined more fully if the frequencies are converted into_____ .

Given below is the scatter plot of the number of employees and the total revenue ($millions)of 20 U.S.companies.Companies that have higher numbers of employees appear to also have higher total revenue.

A Walmart store in a small town monitors customer complaints and organizes these complaints into six distinct categories.Over the past year,suppose the company has received 534 complaints.One possible graphical method for representing these data would be a Pareto chart.

SCENARIO 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Scenario 2-10,90% of the job applicants scored above or equal to_____ .

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,if the sample is a good representation of the population,we can expect_____ percent of the population will own a portable Blu-ray player.

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

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-13,construct a cumulative percentage polygon for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -Referring to Scenario 2-18,how many students have a satisfaction level of at least 80?

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,_____percent of the 600 were females.

Histograms are used for numerical data while bar charts are suitable for categorical data.

SCENARIO 2-11 The ordered array below resulted from selecting a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. Defects 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 -Referring to Scenario 2-11,construct a cumulative percentage distribution for the defects data if the corresponding frequency distribution uses "0 but less than 5" as the first class.

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,of those who owned a portable Blu-ray player in the sample,_____percent were females.