Question 1

The sum of frequencies for all classes will always equal

Accepted Answer

A) 1 
B) the number of elements in a data set 
C) the number of classes 
D) a value between 0 and 1 
A) 1 
B) the number of elements in a data set 
C) the number of classes 
D) a value between 0 and 1 B

Question 2

The SAT scores of a sample of business school students and their genders are shown below.
   
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.

Accepted Answer

a.64
b.240
c.24
d.SAT Scores
Gender
Less than 20
20 up to 25
25 and more
Total
Female
10%
70%
20%
100%
Male
25%
60%
15%
100%
From the above percentages it can be noted that the largest percentages of both genders' SAT scores are in the 20 to 25 range.However,70% of females and only 60% of males have SAT scores in this range.Also it can be noted that 10% of females' SAT scores are under 20,whereas,25% of males' SAT scores fall in this category.e.SAT Scores
Gender
Less than 20
20 up to 25
25 and more
Female
37.5%
63.6%
66.7%
Male
62.5%
36.4%
33.3%
Total
100%
100%
100%

Question 3

The sum of the relative frequencies for all classes will always equal

Accepted Answer

A) the sample size 
B) the number of classes 
C) one 
D) any value larger than one 
A) the sample size 
B) the number of classes 
C) one 
D) any value larger than one C

Question 4

A sample of the ages of 10 employees of a company is shown below.
   
Construct a dot plot for the above data.

Accepted Answer

The answer of A sample of the ages of 10...

Question 5

The most common graphical presentation of quantitative data is a

Accepted Answer

A) histogram 
B) bar chart 
C) relative frequency 
D) pie chart 
A) histogram 
B) bar chart 
C) relative frequency 
D) pie chart

Question 6

A cumulative relative frequency distribution shows

Accepted Answer

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 
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

Question 7

The percent frequency of a class is computed by

Accepted Answer

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 
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

Question 8

Exhibit 2-1
The numbers 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

Accepted Answer

A) 20% 
B) 25% 
C) 75% 
D) 80% 
A) 20% 
B) 25% 
C) 75% 
D) 80%

Question 9

Exhibit 2-1
The numbers 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

Accepted Answer

A) 100% 
B) 75% 
C) 50% 
D) 25% 
A) 100% 
B) 75% 
C) 50% 
D) 25%

Question 10

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.

Accepted Answer

The answer of Forty shoppers were asked if they preferred...

Question 11

In a cumulative relative frequency distribution,the last class will have a cumulative relative frequency equal to

Accepted Answer

A) one 
B) zero 
C) the total number of elements in the data set 
D) None of these alternatives is correct. 
A) one 
B) zero 
C) the total number of elements in the data set 
D) None of these alternatives is correct.

Question 12

When a histogram has a longer tail to the right,it is said to be

Accepted Answer

A) symmetrical 
B) skewed to the left 
C) skewed to the right 
D) None of these alternatives is correct. 
A) symmetrical 
B) skewed to the left 
C) skewed to the right 
D) None of these alternatives is correct.

Question 13

Exhibit 2-1
The numbers of hours worked (per week)by 400 statistics students are shown below.
  
-Refer to Exhibit 2-1.The class width for this distribution

Accepted Answer

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 
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

Question 14

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.

Accepted Answer

The answer of A sample of 50 TV viewers were...

Question 15

Data that provide labels or names for categories of like items are known as

Accepted Answer

A) categorical data 
B) quantitative data 
C) label data 
D) category data 
A) categorical data 
B) quantitative data 
C) label data 
D) category data

Question 16

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

Accepted Answer

A negative relations

Question 17

Construct a stem-and-leaf display for the following data.

Accepted Answer

The answer of Construct a stem-and-leaf display for the following...

Question 18

A graphical presentation of the relationship between two variables is

Accepted Answer

A) an ogive 
B) a histogram 
C) either an ogive or a histogram,depending on the type of data 
D) a scatter diagram 
A) an ogive 
B) a histogram 
C) either an ogive or a histogram,depending on the type of data 
D) a scatter diagram

Question 19

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

Accepted Answer

A) frequency distribution 
B) relative frequency distribution 
C) frequency 
D) cumulative frequency distribution 
A) frequency distribution 
B) relative frequency distribution 
C) frequency 
D) cumulative frequency distribution

Question 20

The sum of the percent frequencies for all classes will always equal

Accepted Answer

A) one 
B) the number of classes 
C) the number of items in the study 
D) 100 
A) one 
B) the number of classes 
C) the number of items in the study 
D) 100

The sum of frequencies for all classes will always equal

The sum of the relative frequencies for all classes will always equal

A sample of the ages of 10 employees of a company is shown below. Construct a dot plot for the above data.

The most common graphical presentation of quantitative data is a

A cumulative relative frequency distribution shows

The percent frequency of a class is computed by

Exhibit 2-1 The numbers 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

Exhibit 2-1 The numbers 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

In a cumulative relative frequency distribution,the last class will have a cumulative relative frequency equal to

When a histogram has a longer tail to the right,it is said to be

Exhibit 2-1 The numbers of hours worked (per week)by 400 statistics students are shown below. -Refer to Exhibit 2-1.The class width for this distribution

Data that provide labels or names for categories of like items are known as

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

Construct a stem-and-leaf display for the following data.

A graphical presentation of the relationship between two variables is

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

The sum of the percent frequencies for all classes will always equal

Data and Statistics

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

Exam 2: Descriptive Statistics: Tabular and Graphical Presentations

The sum of frequencies for all classes will always equal

The sum of the relative frequencies for all classes will always equal

A sample of the ages of 10 employees of a company is shown below. Construct a dot plot for the above data.

The most common graphical presentation of quantitative data is a

A cumulative relative frequency distribution shows

The percent frequency of a class is computed by

Exhibit 2-1 The numbers 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

Exhibit 2-1 The numbers 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

In a cumulative relative frequency distribution,the last class will have a cumulative relative frequency equal to

When a histogram has a longer tail to the right,it is said to be

Exhibit 2-1 The numbers of hours worked (per week)by 400 statistics students are shown below. -Refer to Exhibit 2-1.The class width for this distribution

Data that provide labels or names for categories of like items are known as

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

Construct a stem-and-leaf display for the following data.

A graphical presentation of the relationship between two variables is

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

The sum of the percent frequencies for all classes will always equal

Data and Statistics

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters