Test Bank for Essentials of
Statistics, 7th edition by
Mario F. Triola
A frequency distribution is a tabular summary of data showing the
a. fraction of items in several classes
b. percentage of items in several classes
c. relative percentage of items in several classes
d. number of items in several classes - answer-d. number of items in several classes
A tabular summary of a set of data showing the fraction of the total number of items in
several classes is a
a. frequency distribution
b. relative frequency distribution
c. frequency
d. cumulative frequency distribution - answer-b. relative frequency distribution
The relative frequency of a class is computed by
a. dividing the midpoint of the class by the sample size
b. dividing the frequency of the class by the midpoint
c. dividing the sample size by the frequency of the class
d. dividing the frequency of the class by the sample size - answer-d. dividing the
frequency of the class by the sample size
The percent frequency of a class is computed by
a. multiplying the relative frequency by 10
b. dividing the relative frequency by 100
c. multiplying the relative frequency by 100
d. adding 100 to the relative frequency - answer-c. multiplying the relative frequency by
100
The sum of frequencies for all classes will always equal
a. 1
b. the number of elements in a data set
c. the number of classes
, d. a value between 0 and 1 - answer-b. the number of elements in a data set
Fifteen percent of the students in a school of Business Administration are majoring in
Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The
graphical device(s) which can be used to present these data is (are)
a. a line chart
b. only a bar chart
c. only a pie chart
d. both a bar chart and a pie chart - answer-d. both a bar chart and a pie chart
A researcher is gathering data from four geographical areas designated: South = 1;
North = 2; East = 3; West = 4. The designated geographical regions represent
a. categorical data
b. quantitative data
c. label data
d. either quantitative or categorical data - answer-a. categorical data
Categorical data can be graphically represented by using a(n)
a. histogram
b. frequency polygon
c. ogive
d. bar chart - answer-d. bar chart
A cumulative relative frequency distribution shows
a. the proportion of data items with values less than or equal to the upper limit of each
class
b. the proportion of data items with values less than or equal to the lower limit of each
class
c. the percentage of data items with values less than or equal to the upper limit of each
class
d. the percentage of data items with values less than or equal to the lower limit of each
class - answer-a. the proportion of data items with values less than or equal to the
upper limit of each class
If several frequency distributions are constructed from the same data set, the
distribution with the widest class width will have the
a. fewest classes
b. most classes
c. same number of classes as the other distributions since all are constructed from the
same data - answer-a. fewest classes
Statistics, 7th edition by
Mario F. Triola
A frequency distribution is a tabular summary of data showing the
a. fraction of items in several classes
b. percentage of items in several classes
c. relative percentage of items in several classes
d. number of items in several classes - answer-d. number of items in several classes
A tabular summary of a set of data showing the fraction of the total number of items in
several classes is a
a. frequency distribution
b. relative frequency distribution
c. frequency
d. cumulative frequency distribution - answer-b. relative frequency distribution
The relative frequency of a class is computed by
a. dividing the midpoint of the class by the sample size
b. dividing the frequency of the class by the midpoint
c. dividing the sample size by the frequency of the class
d. dividing the frequency of the class by the sample size - answer-d. dividing the
frequency of the class by the sample size
The percent frequency of a class is computed by
a. multiplying the relative frequency by 10
b. dividing the relative frequency by 100
c. multiplying the relative frequency by 100
d. adding 100 to the relative frequency - answer-c. multiplying the relative frequency by
100
The sum of frequencies for all classes will always equal
a. 1
b. the number of elements in a data set
c. the number of classes
, d. a value between 0 and 1 - answer-b. the number of elements in a data set
Fifteen percent of the students in a school of Business Administration are majoring in
Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The
graphical device(s) which can be used to present these data is (are)
a. a line chart
b. only a bar chart
c. only a pie chart
d. both a bar chart and a pie chart - answer-d. both a bar chart and a pie chart
A researcher is gathering data from four geographical areas designated: South = 1;
North = 2; East = 3; West = 4. The designated geographical regions represent
a. categorical data
b. quantitative data
c. label data
d. either quantitative or categorical data - answer-a. categorical data
Categorical data can be graphically represented by using a(n)
a. histogram
b. frequency polygon
c. ogive
d. bar chart - answer-d. bar chart
A cumulative relative frequency distribution shows
a. the proportion of data items with values less than or equal to the upper limit of each
class
b. the proportion of data items with values less than or equal to the lower limit of each
class
c. the percentage of data items with values less than or equal to the upper limit of each
class
d. the percentage of data items with values less than or equal to the lower limit of each
class - answer-a. the proportion of data items with values less than or equal to the
upper limit of each class
If several frequency distributions are constructed from the same data set, the
distribution with the widest class width will have the
a. fewest classes
b. most classes
c. same number of classes as the other distributions since all are constructed from the
same data - answer-a. fewest classes
