For each of the five data sets described, answer the following three questions
and then use Figure 2.2 (on page 48 ) to choose an appropriate graphical
display for summarizing the data. Question 1: How many variables are in the
data set? Question 2: Is the data set categorical or numerical? Question 3:
Would the purpose of the graphical display be to summarize the data
distribution, to compare groups, or to investigate the relationship between
two numerical variables? Data Set 1: To learn about credit card debt of
students at a college, the financial aid office asks each student in a random
sample of 75 students about his or her amount of credit card debt.
Data Set 2: To learn about how number of hours worked per week and number of
hours spent watching television in a typical week are related, each person in
a sample of size 40 was asked to keep a log of hours worked and hours spent
watching television for one week. At the end of the week, each person reported
the total number of hours spent on each activity. Data Set 3: To see if
satisfaction level differs for airline passengers based on where they sit on
the airplane, all passengers on a particular flight were surveyed at the end
of the flight. Passengers were grouped based on whether they sat in an aisle
seat, a middle seat, or a window seat. Each passenger was asked to indicate
his or her satisfaction with the flight by selecting one of the following
choices: very satisfied, satisfied, dissatisfied, and very dissatisfied.
Data Set 4: To learn about where students purchase textbooks, each student in
a random sample of 200 students at a particular college was asked to select
one of the following responses: campus bookstore, off-campus bookstore,
purchased all books online, or used a combination of online and bookstore
purchases.
Data Set 5 : To compare the amount of money men and women spent on their most
recent haircut, each person in a sample of 20 women and each person in a
sample of 20 men was asked how much was spent on his or her most recent
haircut.
