Question 1

A ________ displays the frequency of each class with qualitative data and a ________ displays the frequency of each class with quantitative data.

Question 2

When developing a frequency distribution, the class (group) intervals must be ________.

Question 3

A(n) ________ is a graph of a cumulative distribution.

Question 4

All of the following are used to describe quantitative data except the ________.

• histogram
• pie chart
• stem-and-leaf display
• dot plot

Question 5

Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.

Distance	Frequency
1-8 miles	15
9-16 miles	12
17-24 miles	7
25-32 miles	5
33-40 miles	1

Question 6

A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf display (leaf unit = 0.1).

5	269
6	255568999
7	11224557789
8	001222458
9	02455679
10	1556
11	137
12
13	255

What is the smallest percentage spent on R&D?

Question 7

The following is a relative frequency distribution of grades in an introductory statistics course.

Grade		Relative Frequency
A		0.22
B		?
C		0.18
D		0.17
F		0.06

If this was the distribution of 200 students, find the frequency for the highest two grades.

Question 8

822 recently purchased books were randomly selected from all recent book purchases over the Internet. The chart below shows the breakdown of the classification of the book type.

Top 50 Fiction, 189 Distribution of Books Purchased on the Children's Books, 168 Internet Mystery, 153 Sci Fi/Fantasy, 147 Self-help Books, 94 Biographies, 34 Classical Books, 22 Textbooks, 15