Exam 2: Organizing and Visualizing Data

TABLE 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 Table 2-18, how many students have a satisfaction level below 60?

TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, if the sample is a good representation of the population, we can expect ________ percent of the males in the population will own a portable DVD.

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. Did Well in Midterm Did Poorly in Midterm Studying for Exam 80 20 Went Bar Hopping 30 70 -Referring to Table 2-6, ________ percent of the students in the sample spent the weekend studying and did well on the midterm.

A research analyst was directed to arrange raw data collected on the yield of wheat, ranging from 40 to 93 bushels per acre, in a frequency distribution. He should choose 30 as the class interval width.

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. For Neutral Aqainst Totals Female 38 54 12 104 Male 12 36 48 96 Totals 50 90 60 200 -Referring to Table 2-12, construct a table of total percentages.

TABLE 2-13 Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in tenths of gallons) in a day by 25 drive-through car wash operations in Phoenix. $9 \mid 147$ $10 \mid 02238$ 11 | 135566777 $12 \mid 223489$ $13 \mid 02$ -Referring to Table 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.

Determining the class boundaries of a frequency distribution is highly subjective.

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

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. Did Well in Midterm Did Poorly in Midterm Studying for Exam 80 20 Went Bar Hopping 30 70 -Referring to Table 2-6, of those who went bar hopping the weekend before the midterm in the sample, ________ percent of them did well on the midterm.

It is essential that each class grouping or interval in a frequency distribution be ________ and ________.

TABLE 2-17 The following table presents total retail sales in millions of dollars for the leading apparel companies during April 2009 and April 2010. APPAREL COMPANY April2009 April 2010 Gap 1,159.00 962 TJX 781.7 899 Limited 596.5 620.4 Kohl's 544.9 678.9 Nordstrom 402.6 418.3 Talbots 139.9 130.1 Ann Taylor 114.2 124.8 -Referring to Table 2-17, construct a side-by-side bar chart.

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 applicants scored between 20 and below 50.

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 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 4 methods of data collection is involved when people are asked to compare the three types of peanut butter?

A ________ is a vertical bar chart in which the rectangular bars are constructed at the boundaries of each class interval.

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 applicants scored below 20 or at least 50.

A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

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. Did Well in Midterm Did Poorly in Midterm Studying for Exam 80 20 Went Bar Hopping 30 70 -Referring to Table 2-6, of those who did well on the midterm in the sample, ________ percent of them went bar hopping the weekend before the midterm.

TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, ________ percent of the 600 were males who did not own a portable DVD.