# Quiz 2: Descriptive Statistics: Tabular and Graphical Displays

Statistics

Q 1Q 1

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

Free

Multiple Choice

D

Q 2Q 2

An Ogive is constructed by plotting a point corresponding to the frequency of each class.
A) relative
B) cumulative
C) percent
D) octave

Free

Multiple Choice

B

Q 3Q 3

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

Free

Multiple Choice

B

Q 4Q 4

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

Free

Multiple Choice

Q 5Q 5

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

Free

Multiple Choice

Q 6Q 6

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

Free

Multiple Choice

Q 7Q 7

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 devices) 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

Free

Multiple Choice

Q 8Q 8

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

Free

Multiple Choice

Q 9Q 9

Categorical data can be graphically represented by using an)
A) histogram
B) frequency polygon
C) ogive
D) bar chart

Free

Multiple Choice

Q 10Q 10

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

Free

Multiple Choice

Q 11Q 11

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

Free

Multiple Choice

Q 12Q 12

The sum of the relative frequencies for all classes will always equal
A) the sample size
B) the number of classes
C) one
D) any value larger than one

Free

Multiple Choice

Q 13Q 13

The sum of the percent frequencies for all classes will always equal
A) one
B) the number of classes
C) the number of items in the study
D) 100

Free

Multiple Choice

Q 14Q 14

The most common graphical presentation of quantitative data is a
A) histogram
B) bar chart
C) relative frequency
D) pie chart

Free

Multiple Choice

Q 15Q 15

The total number of data items with a value less than the upper limit for the class is given by the
A) frequency distribution
B) relative frequency distribution
C) cumulative frequency distribution
D) cumulative relative frequency distribution

Free

Multiple Choice

Q 16Q 16

The relative frequency of a class is computed by
A) dividing the cumulative frequency of the class by n
B) dividing n by cumulative frequency of the class
C) dividing the frequency of the class by n
D) dividing the frequency of the class by the number of classes

Free

Multiple Choice

Q 17Q 17

In constructing a frequency distribution, the approximate class width is computed as
A) largest data value - smallest data value)/number of classes
B) largest data value - smallest data value)/sample size
C) smallest data value - largest data value)/sample size
D) largest data value/number of classes

Free

Multiple Choice

Q 18Q 18

In constructing a frequency distribution, as the number of classes are decreased, the class width
A) decreases
B) remains unchanged
C) increases
D) can increase or decrease depending on the data values

Free

Multiple Choice

Q 19Q 19

The difference between the lower class limits of adjacent classes provides the
A) number of classes
B) class limits
C) class midpoint
D) class width

Free

Multiple Choice

Q 20Q 20

In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to
A) one
B) 100%
C) the total number of elements in the data set
D) None of these alternatives is correct.

Free

Multiple Choice

Q 21Q 21

In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to
A) one
B) zero
C) the total number of elements in the data set
D) None of these alternatives is correct.

Free

Multiple Choice

Q 22Q 22

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to
A) one
B) 100
C) the total number of elements in the data set
D) None of these alternatives is correct.

Free

Multiple Choice

Q 23Q 23

Data that provide labels or names for categories of like items are known as
A) categorical data
B) quantitative data
C) label data
D) category data

Free

Multiple Choice

Q 24Q 24

A tabular method that can be used to summarize the data on two variables simultaneously is called
A) simultaneous equations
B) crosstabulation
C) a histogram
D) an ogive

Free

Multiple Choice

Q 25Q 25

A graphical presentation of the relationship between two variables is
A) an ogive
B) a histogram
C) either an ogive or a histogram, depending on the type of data
D) a scatter diagram

Free

Multiple Choice

Q 26Q 26

A histogram is said to be skewed to the left if it has a
A) longer tail to the right
B) shorter tail to the right
C) shorter tail to the left
D) longer tail to the left

Free

Multiple Choice

Q 27Q 27

When a histogram has a longer tail to the right, it is said to be
A) symmetrical
B) skewed to the left
C) skewed to the right
D) none of these alternatives is correct

Free

Multiple Choice

Q 28Q 28

In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as
A) approximation line
B) trend line
C) line of zero intercept
D) line of zero slope

Free

Multiple Choice

Q 29Q 29

A histogram is
A) a graphical presentation of a frequency or relative frequency distribution
B) a graphical method of presenting a cumulative frequency or a cumulative relative frequency distribution
C) the history of data elements
D) the same as a pie chart

Free

Multiple Choice

Q 30Q 30

A situation in which conclusions based upon aggregated crosstabulation are different from unaggregated crosstabulation is known as
A) wrong crosstabulation
B) Simpson's rule
C) Simpson's paradox
D) aggregated crosstabulation

Free

Multiple Choice

Q 31Q 31

The reversal of conclusions based on aggregate and unaggregated data is called
A) Simpson's paradox
B) Trim's paradox
C) Poisson dilemma
D) Simon's paradox

Free

Multiple Choice

Q 32Q 32

Conclusions drawn from two or more separate crosstabulations that can be reversed when the data are aggregated into a single crosstabulation is known as
A) incorrect crosstabulation
B) error of crosstabulation
C) simpson's crosstabulation
D) Simpson's paradox

Free

Multiple Choice

Q 33Q 33

Which of the following graphical methods shows the relationship between two variables?
A) pie chart
B) Ogive
C) crosstabulation
D) dot plot

Free

Multiple Choice

Q 34Q 34

The can be used to show the rank order and shape of a data set simultaneously.
A) Ogive
B) pie chart
C) stem-and-leaf display
D) bar chart

Free

Multiple Choice

Q 35Q 35

Which of the following is a graphical summary of a set of data in which each data value is represented by a dot above the axis?
A) histogram
B) box plot
C) dot plot
D) crosstabulation

Free

Multiple Choice

Q 36Q 36

A set of visual displays that organizes and presents information that is used to monitor the performance of a company or organization in a manner that is easy to read, understand, and interpret.
A) data dashboard
B) data computation
C) hypothesis testing
D) organization of the hypothesis

Free

Multiple Choice

Q 37Q 37

A line that provides an approximation of the relationship between two variables is known as the
A) relationship line
B) Trend line
C) line of 2 variables
D) approximation of two variables

Free

Multiple Choice

Q 38Q 38

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

Free

Multiple Choice

Q 39Q 39

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The class width for this distribution
A) is 9
B) is 10
C) is 39, which is: the largest value minus the smallest value or 39 - 0 = 39
D) varies from class to class

Free

Multiple Choice

Q 40Q 40

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The number of students working 19 hours or less
A) is 80
B) is 100
C) is 180
D) is 300

Free

Multiple Choice

Q 41Q 41

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less
A) is 20
B) is 100
C) is 0.95
D) 0.05

Free

Multiple Choice

Q 42Q 42

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The percentage of students working 19 hours or less is
A) 20%
B) 25%
C) 75%
D) 80%

Free

Multiple Choice

Q 43Q 43

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29
A) is 300
B) is 0.25
C) is 0.75
D) is 0.5

Free

Multiple Choice

Q 44Q 44

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is
A) 100%
B) 75%
C) 50%
D) 25%

Free

Multiple Choice

Q 45Q 45

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The cumulative frequency for the class of 20 - 29
A) is 200
B) is 300
C) is 0.75
D) is 0.5

Free

Multiple Choice

Q 46Q 46

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency of
A) 100
B) 1
C) 30 - 39
D) 400

Free

Multiple Choice

Q 47Q 47

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The percentage of students who work at least 10 hours per week is
A) 50%
B) 5%
C) 95%
D) 100%

Free

Multiple Choice

Q 48Q 48

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The number of students who work 19 hours or less is
A) 80
B) 100
C) 200
D) 400

Free

Multiple Choice

Q 49Q 49

Exhibit 2-1
The number of hours worked per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The midpoint of the last class is
A) 50
B) 34
C) 35
D) 34.5

Free

Multiple Choice

Q 50Q 50

Exhibit 2-2
A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.
Undergraduate Major
-Refer to Exhibit 2-2. What percentage of the students does not plan to go to graduate school?
A) 280
B) 520
C) 65
D) 32

Free

Multiple Choice

Q 51Q 51

Exhibit 2-2
A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.
Undergraduate Major
-Refer to Exhibit 2-2. What percentage of the students' undergraduate major is engineering?
A) 292
B) 520
C) 65
D) 36.5

Free

Multiple Choice

Q 52Q 52

Exhibit 2-2
A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.
Undergraduate Major
-Refer to Exhibit 2-2. Of those students who are majoring in business, what percentage plans to go to graduate school?
A) 27.78
B) 8.75
C) 70
D) 72.22

Free

Multiple Choice

Q 53Q 53

Exhibit 2-2
A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.
Undergraduate Major
-Refer to Exhibit 2-2. Among the students who plan to go to graduate school, what percentage indicated "Other" majors?
A) 15.75
B) 45
C) 54
D) 35

Free

Multiple Choice

Q 54Q 54

Exhibit 2-3
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-3. The class width of the above distribution is
A) 0 to 100
B) 20
C) 80
D) 5

Free

Multiple Choice

Q 55Q 55

Exhibit 2-3
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-3. The lower limit of the first class is
A) 5
B) 80
C) 0
D) 20

Free

Multiple Choice

Q 56Q 56

Exhibit 2-3
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-3. If one develops a cumulative frequency distribution for the above data, the last class will have a frequency of
A) 10
B) 100
C) 0 to 100
D) 80

Free

Multiple Choice

Q 57Q 57

Exhibit 2-3
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-3. The percentage of days in which the company sold at least 40 laptops is
A) 37.5%
B) 62.5%
C) 90.0%
D) 75.0%

Free

Multiple Choice

Q 58Q 58

Exhibit 2-3
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-3. The number of days in which the company sold less than 60 laptops is
a. 20
b. 30
c. 50

Free

Not Answered

There is no answer for this question

Q 59Q 59

d. 60 ANSWER: c Exhibit 2-4
A sample of 15 children shows their favorite restaurant:
-Refer to Exhibit 2-4. The frequency distribution for these data is
A) McDonalds 4, Friday's 3, Pizza Hut 1, Mellow Mushroom 4, Luppi's 3, Taco Bell 1
B) McDonalds 6, Friday's 2, Pizza Hut 2, Mellow Mushroom 2, Luppi's 2, Taco Bell 1
C) McDonalds 6, Friday's 1, Pizza Hut 3, Mellow Mushroom 1, Luppi's 2, Taco Bell 2
D) McDonalds 2, Friday's 6, Pizza Hut 3, Mellow Mushroom 1, Luppi's 2, Taco Bell 2

Free

Multiple Choice

Q 60Q 60

d. 60 ANSWER: c Exhibit 2-4
A sample of 15 children shows their favorite restaurant:
-Refer to Exhibit 2-4. Determine the relative frequency for McDonalds.
A) 0.27
B) 0.5
C) 0.4
D) 6

Free

Multiple Choice

Q 61Q 61

d. 60 ANSWER: c Exhibit 2-4
A sample of 15 children shows their favorite restaurant:
-Refer to Exhibit 2-4. Determine the percent frequency for McDonalds.
A) 10%
B) 27%
C) 2%
D) 40%

Free

Multiple Choice

Q 62Q 62

Twenty employees of the Ahmadi Corporation were asked if they liked or disliked the new district manager. Below you are given their responses. Let L represent liked and D represent disliked.
a. Construct a frequency distribution and a bar chart.
b. Construct a relative frequency distribution and a pie chart.

Free

Essay

Q 63Q 63

Forty shoppers were asked if they preferred the weight of a can of soup to be 6 ounces, 8 ounces, or 10 ounces. Below you are given their responses.
a. Construct a frequency distribution and graphically represent the frequency distribution.
b. Construct a relative frequency distribution and graphically represent the relative frequency distribution.

Free

Essay

Q 64Q 64

A student has completed 20 courses in the School of Arts and Sciences. Her grades in the 20 courses are shown below.
a. Develop a frequency distribution and a bar chart for her grades.
b. Develop a relative frequency distribution for her grades and construct a pie chart.

Free

Essay

Q 65Q 65

A sample of 50 TV viewers were asked, "Should TV sponsors pull their sponsorship from programs that draw numerous viewer complaints?" Below are the results of the survey. Y = Yes; N = No; W = Without Opinion)
a. Construct a frequency distribution and a bar chart.
b. Construct a relative frequency distribution and a pie chart.

Free

Essay

Q 66Q 66

Below you are given the examination scores of 20 students.
a. Construct a frequency distribution for this data. Let the first class be 50 - 59 and draw a histogram.
b. Construct a cumulative frequency distribution.
c. Construct a relative frequency distribution.
d. Construct a cumulative relative frequency distribution.

Free

Essay

Q 67Q 67

The frequency distribution below was constructed from data collected from a group of 25 students.
a. Construct a relative frequency distribution.
b. Construct a cumulative frequency distribution.
c. Construct a cumulative relative frequency distribution.

Free

Essay

Q 68Q 68

The frequency distribution below was constructed from data collected on the quarts of soft drinks consumed per week by 20 students.
a. Construct a relative frequency distribution.
b. Construct a cumulative frequency distribution.
c. Construct a cumulative relative frequency distribution.

Free

Essay

Q 69Q 69

The grades of 10 students on their first management test are shown below.
a. Construct a frequency distribution. Let the first class be 60 - 69.
b. Construct a cumulative frequency distribution.
c. Construct a relative frequency distribution.

Free

Essay

Q 70Q 70

There are 800 students in the School of Business Administration. There are four majors in the School: Accounting, Finance, Management, and Marketing. The following shows the number of students in each major.
Develop a percent frequency distribution and construct a bar chart and a pie chart.

Free

Essay

Q 71Q 71

You are given the following data on the ages of employees at a company. Construct a stem-and-leaf display.

Free

Essay

Free

Essay

Q 73Q 73

The SAT scores of a sample of business school students and their genders are shown below.
SAT Scores
a. How many students scored less than 20?
b. How many students were female?
c. Of the male students, how many scored 25 or more?
d. Compute row percentages and comment on any relationship that may exist between SAT scores and gender of the individuals.
e. Compute column percentages.

Free

Essay

Q 74Q 74

For the following observations, plot a scatter diagram and indicate what kind of relationship if any) exist between x and y.

Free

Essay

Q 75Q 75

For the following observations, plot a scatter diagram and indicate what kind of relationship if any) exist between x and y.

Free

Essay

Q 76Q 76

Five hundred recent graduates indicated their majors as follows.
a. Construct a relative frequency distribution.
b. Construct a percent frequency distribution.

Free

Essay

Q 77Q 77

The sales record of a real estate company for the month of May shows the following house prices rounded to the nearest $1,000). Values are in thousands of dollars.
a. Develop a frequency distribution and a percent frequency distribution for the house prices. Use 5 classes and have your first class be 20 - 39.)
b. Develop a cumulative frequency and a cumulative percent frequency distribution for the above data.
c. 70%
c. What percentage of the houses sold at a price below $80,000?

Free

Essay

Q 78Q 78

The following data set shows the number of hours of sick leave that some of the employees of Bastien's, Inc. have taken during the first quarter of the year rounded to the nearest hour).
a. Develop a frequency distribution for the above data. Let the width of your classes be 10 units and start your first class as 10 - 19.)
b. Develop a relative frequency distribution and a percent frequency distribution for the data.
c. Develop a cumulative frequency distribution.
d. 22
d. How many employees have taken less than 40 hours of sick leave?

Free

Essay

Q 79Q 79

A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.
Undergraduate Major
a. Are a majority of the seniors in the survey planning to attend graduate school?
b. Which discipline constitutes the majority of the individuals in the survey?
c. Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school.
d. Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major.

Free

Essay

Q 80Q 80

The following data shows the price of PAO, Inc. stock over the last eight months.
a. Develop a scatter diagram and draw a trend line through the points.
b. What kind of relationship exists between stock price and time negative, positive, or no relation)?

Free

Essay