Testbank
to accompany
Business analytics and
statistics
1st edition
by
Black et al.
© John Wiley & Sons Australia, Ltd 2019
mynursytest.store
, Chapter 2: Data visualisation
Chapter 2
Data visualisation
True/False Questions
1. Data grouped into intervals with the number of items in each group listed is called a frequency
distribution.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
2. The width of a class interval in a frequency distribution will be approximately equal to the
range divided by the midpoint of the middle class.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Medium
3. A rule that must always be followed in constructing frequency distributions is that each data
point can only fall into one class.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
4. The midpoint of the class interval (10, 12] is 11.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
© John Wiley and Sons Australia, Ltd 2026 2.2
mynursytest.store
,Testbank to accompany Business analytics and statistics 1e by Black et al.
5. The midpoint of the class interval (6, 9] is 3.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
6. The range of data in the following frequency distribution is 10.
Class interval Frequency
(10, 20] 15
(20, 30] 25
(30, 40] 10
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
7. A financial analyst has randomly selected 200 companies from those traded on the Australian
Securities Exchange. At the end of each trading day, the analyst records the closing price for
each of the 200 companies. These 200 measurements are an example of grouped data.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
8. If the individual class frequency is divided by the total frequency, the result is the relative
frequency.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Medium
© John Wiley and Sons Australia, Ltd 2026 2.3
mynursytest.store
, Chapter 2: Data visualisation
9. A researcher has decided to construct a frequency distribution for a set of data containing 60
numbers. The lowest number is 23 and the highest number is 68. If 7 classes are used, the class
width should be approximately 7.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
10. The cumulative frequency for a class is 27. The cumulative frequency for the next (non-
empty) class will be greater than 27.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
11. In the following relative frequency distribution given below, if there were 60 numbers in the
data set, 20 numbers were in the interval (20, 40].
Class interval Relative frequency
(20, 40] 0.2
(40, 60] 0.3
(60, 80] 0.4
(80, 100] 0.1
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
© John Wiley and Sons Australia, Ltd 2026 2.4
mynursytest.store
to accompany
Business analytics and
statistics
1st edition
by
Black et al.
© John Wiley & Sons Australia, Ltd 2019
mynursytest.store
, Chapter 2: Data visualisation
Chapter 2
Data visualisation
True/False Questions
1. Data grouped into intervals with the number of items in each group listed is called a frequency
distribution.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
2. The width of a class interval in a frequency distribution will be approximately equal to the
range divided by the midpoint of the middle class.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Medium
3. A rule that must always be followed in constructing frequency distributions is that each data
point can only fall into one class.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
4. The midpoint of the class interval (10, 12] is 11.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
© John Wiley and Sons Australia, Ltd 2026 2.2
mynursytest.store
,Testbank to accompany Business analytics and statistics 1e by Black et al.
5. The midpoint of the class interval (6, 9] is 3.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
6. The range of data in the following frequency distribution is 10.
Class interval Frequency
(10, 20] 15
(20, 30] 25
(30, 40] 10
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
7. A financial analyst has randomly selected 200 companies from those traded on the Australian
Securities Exchange. At the end of each trading day, the analyst records the closing price for
each of the 200 companies. These 200 measurements are an example of grouped data.
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
8. If the individual class frequency is divided by the total frequency, the result is the relative
frequency.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Medium
© John Wiley and Sons Australia, Ltd 2026 2.3
mynursytest.store
, Chapter 2: Data visualisation
9. A researcher has decided to construct a frequency distribution for a set of data containing 60
numbers. The lowest number is 23 and the highest number is 68. If 7 classes are used, the class
width should be approximately 7.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
10. The cumulative frequency for a class is 27. The cumulative frequency for the next (non-
empty) class will be greater than 27.
*a. True
b. False
General Feedback:
Section 2.1, Difficulty: Easy
11. In the following relative frequency distribution given below, if there were 60 numbers in the
data set, 20 numbers were in the interval (20, 40].
Class interval Relative frequency
(20, 40] 0.2
(40, 60] 0.3
(60, 80] 0.4
(80, 100] 0.1
a. True
*b. False
General Feedback:
Section 2.1, Difficulty: Easy
© John Wiley and Sons Australia, Ltd 2026 2.4
mynursytest.store
