Chapter 2 Quiz and Study Guide

Question 1

A _________ displays the frequency of each class with qualitative data and a _______ displays the frequency of each class with quantitative data.
a. bar chart, histogram
b. histogram, stem-and-leaf display
c. stem-and-leaf, pie chart
d. scatter plot, bar chart

Answer 1

a. bar chart, histogram

Question 1

Which of the following divides quantitative measurements into classes and graphs the frequency, relative frequency, or percentage frequency for each class?
a. stem-and-leaf display
b. histogram
c. scatter plot
d. dot plot

Answer 1

b. histogram

Question 2

A _________ shows the relationship between two variables.
a. pie chart
b. histogram
c. scatter plot
d. bar chart

Answer 2

scatter plot

Question 3

A(n) _________ can be used to differentiate the “vital few” causes of quality problems from the “trivial many” causes of quality problems.
a. scatter plot
b. pareto chart
c. stem-and-leaf display
d. ogive plot

Answer 3

b. pareto chart

Question 4

Which of the following graphical tools is not used to study the shapes of distributions?
a. histogram
b. stem-and-leaf display
c. scatter plot
d. bar graph

Answer 4

c. scatter plot

Question 5

A(n) ________ is a graphical presentation of the current status and historical trends of a business’s key performance indicators.
a. frequency distribution
b. histogram
c. pareto chart
d. dashboard

Answer 5

d. dashboard

Question 6

As a business owner, I have requested my staff to develop a set of dashboards that can be used by
the public to show wait time at each of my four local coffee shops at peak times during the day and whether the time is short, medium, or long. Which of the following graphical displays would be the best choice?
a. sparkline
b. bullet graph
c. treemap
d. gauges

Answer 6

b. bullet graph

Question 7

A(n) ________ is a graph of a cumulative distribution.
a. histogram
b. scatter plot
c. ogive
d. pie chart

Answer 7

c. ogive

Question 8

All of the following are used to describe quantitative data except the ________.
a. histogram
b. stem-and-leaf chart
c. dot plot
d. pie chart

Answer 8

d. pie chart

Question 9

Which of the following graphs is for qualitative data?
a. histogram
b. bar chart
c. ogive plot
d. stem-and-leaf

Answer 9

b. bar chart

Question 10

A stem-and-leaf display is best used to ________.
a. provide a point estimate of the variability of the data set
b. provide a point estimate of the central tendency of the data set
c. display the shape of the distribution
d. display a two-variable treemap

Answer 10

c. display the shape of the distribution

Question 11

When developing a frequency distribution, the class (group) intervals must be ________.
a. large
b. small
c. integer
d. nonoverlapping

Answer 11

d. nonoverlapping

Question 12

If there are 130 values in a data set, how many classes should be created for a frequency distribution?
a. 4
b. 5
c. 6
d. 7
e. 8

Answer 12

e. 8

(2^k, where k = number of classes and 2^k is the closest value larger than 130. 2^7 = 128; 2^8 = 256.)

Question 13

The general term for a graphical display of categorical data made up of vertical or horizontal bars is
called a(n) ________.
a. pie chart
b. Pareto chart
c. bar chart
d. ogive plot

Answer 13

c. bar chart

Question 14

A relative frequency histogram having a longer tail to the right than to the left is said to be ________.
a. skewed to the left
b. normal
c. a scatter plot
d. skewed to the right

Answer 14

d. skewed to the right