Question 1

The stem-and-leaf display for summarizing numerical data is a combination of a graphic technique and a sorting technique.

Accepted Answer

A) True 
 B)False

Question 2

Determine the percentage of time it takes an employee at most 12.5 hours to process an order at the plumbing wholesaler.

Accepted Answer

The answer of Determine the percentage of time it takes...

Question 3

When a variable is measured,a numerical value code is assigned to it,and the result will be in one of four levels of measurement - nominal,ordinal,interval,or ratio.

Accepted Answer

A) True 
 B)False

Question 4

A professor is looking for a volunteer for a project.She chooses a number between 00 and 99.The student whose phone number has the last two digits closest to the one the professor has chosen is selected.This is an example of a simple random sample.

Accepted Answer

A) True 
 B)False

Question 5

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In a recent marketing experiment,consumers were given one of four different types of dishwashing detergent and asked to use it for a month.At the end of that time they were asked to rate the detergent in terms of overall quality.The results are presented below.
  
-Of the customers who were given Brand A,what percentage rated it poor?

Accepted Answer

A) 12.5% 
B) 2)40% 
C) 11.6% 
D) 18.9% 
A) 12.5% 
B) 2)40% 
C) 11.6% 
D) 18.9%

Question 6

Which of the following is a categorical variable?

Accepted Answer

A) tire pressure 
B) bank account balance 
C) daily sales in a store 
D) eye color 
A) tire pressure 
B) bank account balance 
C) daily sales in a store 
D) eye color

Question 7

A recent Wall Street Journal poll asked a group of American voters to rate economic conditions in the United States.92% of the respondents rated economic conditions as "unfavorable." Identify the population,sample,sample statistic,and population parameter in this survey.

Accepted Answer

Population: All eligible voters in the U

Question 8

Inferential statistics is the study and description of data that result from an experiment.

Accepted Answer

A) True 
 B)False

Question 9

Dimensional characteristics,such as height,are an example of a:

Accepted Answer

A) continuous random variable. 
B) discrete random variable. 
C) categorical random variable. 
D) any of the above 
A) continuous random variable. 
B) discrete random variable. 
C) categorical random variable. 
D) any of the above

Question 10

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In a recent marketing experiment,consumers were given one of four different types of dishwashing detergent and asked to use it for a month.At the end of that time they were asked to rate the detergent in terms of overall quality.The results are presented below.
  
-What percentage of the consumers rated their detergent average or better?

Accepted Answer

A) 23.6% 
B) 40.1% 
C) 81.1% 
D) 17.5% 
A) 23.6% 
B) 40.1% 
C) 81.1% 
D) 17.5%

Question 11

In a frequency distribution,what is the number of observations in a class called?

Accepted Answer

A) class midpoint 
B) class frequency 
C) class interval 
D) none of the above 
A) class midpoint 
B) class frequency 
C) class interval 
D) none of the above

Question 12

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The data presented below were collected on the amount of time,in hours;it takes an employee,to process an order at a local plumbing wholesaler.
  
-Construct a frequency histogram of the data.

Accepted Answer

The answer of THE NEXT QUESTIONS ARE BASED ON THE...

Question 13

A histogram which is skewed to the left has more:

Accepted Answer

A) lower values. 
B) higher values. 
C) even values. 
D) odd values. 
A) lower values. 
B) higher values. 
C) even values. 
D) odd values.

Question 14

The sales manager for a local commercial waste disposal company has tracked the yearly dollar value (in $1000)of contracts made by both internal sales people and external sales people.The data are presented below.Graph the data with a time plot.What possible conclusions or actions might the firm consider?

Accepted Answer

It appears that internal sales

Question 15

The type of variables which produce responses that belong to groups or categories,such as responses to yes or no questions,are called:

Accepted Answer

A) continuous numerical variables. 
B) discrete numerical variables. 
C) categorical variables. 
D) inverse variables. 
A) continuous numerical variables. 
B) discrete numerical variables. 
C) categorical variables. 
D) inverse variables.

Question 16

A time-series plot is considered a pie chart that displays the relative frequency of defect causes and is used to separate the "vital few" from the "trivial many"

Accepted Answer

A) True 
 B)False

Question 17

Which of the following statements about a pie chart is false?

Accepted Answer

A) A pie chart is graphical representation of the proportion or percentage of frequency of each category of a categorical variable. 
B) A pie chart is usually used to display the relative sizes of categories of a numerical variable. 
C) A pie chart always has the shape of a circle. 
D) The size of each slice of a pie chart is the proportion or percentage of frequency of the corresponding category of a categorical variable. 
A) A pie chart is graphical representation of the proportion or percentage of frequency of each category of a categorical variable. 
B) A pie chart is usually used to display the relative sizes of categories of a numerical variable. 
C) A pie chart always has the shape of a circle. 
D) The size of each slice of a pie chart is the proportion or percentage of frequency of the corresponding category of a categorical variable.

Question 18

If the sample is a good representation of the population,what percentage of those who spent the weekend studying should we expect to do poorly on the final exam?

Accepted Answer

The answer of If the sample is a good representation...

Question 19

Descriptive statistics is the study of a sample that enables a researcher to make projections or estimates about the population from which the sample is drawn.

Accepted Answer

A) True 
 B)False

Question 20

Consider the following frequency distribution generated by Excel.What is the missing frequency value identified by the asterisk?

Accepted Answer

A) 3 
B) 15 
C) 16 
D) 25 
A) 3 
B) 15 
C) 16 
D) 25

The stem-and-leaf display for summarizing numerical data is a combination of a graphic technique and a sorting technique.

Determine the percentage of time it takes an employee at most 12.5 hours to process an order at the plumbing wholesaler.

When a variable is measured,a numerical value code is assigned to it,and the result will be in one of four levels of measurement - nominal,ordinal,interval,or ratio.

A professor is looking for a volunteer for a project.She chooses a number between 00 and 99.The student whose phone number has the last two digits closest to the one the professor has chosen is selected.This is an example of a simple random sample.

Which of the following is a categorical variable?

A recent Wall Street Journal poll asked a group of American voters to rate economic conditions in the United States.92% of the respondents rated economic conditions as "unfavorable." Identify the population,sample,sample statistic,and population parameter in this survey.

Inferential statistics is the study and description of data that result from an experiment.

Dimensional characteristics,such as height,are an example of a:

In a frequency distribution,what is the number of observations in a class called?

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The data presented below were collected on the amount of time,in hours;it takes an employee,to process an order at a local plumbing wholesaler. -Construct a frequency histogram of the data.

A histogram which is skewed to the left has more:

The type of variables which produce responses that belong to groups or categories,such as responses to yes or no questions,are called:

A time-series plot is considered a pie chart that displays the relative frequency of defect causes and is used to separate the "vital few" from the "trivial many"

Which of the following statements about a pie chart is false?

If the sample is a good representation of the population,what percentage of those who spent the weekend studying should we expect to do poorly on the final exam?

Descriptive statistics is the study of a sample that enables a researcher to make projections or estimates about the population from which the sample is drawn.

Consider the following frequency distribution generated by Excel.What is the missing frequency value identified by the asterisk?

Describing Data: Numerical

Probability

Discrete Random Variables and Probability Distributions

Continuous Random Variables and Probability Distributions

Sampling and Sampling Distributions

Estimation: Single Population

Estimation: Additional Topics

Hypothesis Testing: Single Population

Hypothesis Testing: Additional Topics

Simple Regression

Multiple Regression

Additional Topics in Regression Analysis

Analysis of Categorical Data

Analysis of Variance

Time-Series Analysis and Forecasting

Additional Topics in Sampling

Filters

Exam 1: Describing Data: Graphical

The stem-and-leaf display for summarizing numerical data is a combination of a graphic technique and a sorting technique.

Determine the percentage of time it takes an employee at most 12.5 hours to process an order at the plumbing wholesaler.

When a variable is measured,a numerical value code is assigned to it,and the result will be in one of four levels of measurement - nominal,ordinal,interval,or ratio.

A professor is looking for a volunteer for a project.She chooses a number between 00 and 99.The student whose phone number has the last two digits closest to the one the professor has chosen is selected.This is an example of a simple random sample.

Which of the following is a categorical variable?

A recent Wall Street Journal poll asked a group of American voters to rate economic conditions in the United States.92% of the respondents rated economic conditions as "unfavorable." Identify the population,sample,sample statistic,and population parameter in this survey.

Inferential statistics is the study and description of data that result from an experiment.

Dimensional characteristics,such as height,are an example of a:

In a frequency distribution,what is the number of observations in a class called?

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The data presented below were collected on the amount of time,in hours;it takes an employee,to process an order at a local plumbing wholesaler. -Construct a frequency histogram of the data.

A histogram which is skewed to the left has more:

The type of variables which produce responses that belong to groups or categories,such as responses to yes or no questions,are called:

A time-series plot is considered a pie chart that displays the relative frequency of defect causes and is used to separate the "vital few" from the "trivial many"

Which of the following statements about a pie chart is false?

If the sample is a good representation of the population,what percentage of those who spent the weekend studying should we expect to do poorly on the final exam?

Descriptive statistics is the study of a sample that enables a researcher to make projections or estimates about the population from which the sample is drawn.

Consider the following frequency distribution generated by Excel.What is the missing frequency value identified by the asterisk?

Describing Data: Numerical

Probability

Discrete Random Variables and Probability Distributions

Continuous Random Variables and Probability Distributions

Sampling and Sampling Distributions

Estimation: Single Population

Estimation: Additional Topics

Hypothesis Testing: Single Population

Hypothesis Testing: Additional Topics

Simple Regression

Multiple Regression

Additional Topics in Regression Analysis

Analysis of Categorical Data

Analysis of Variance

Time-Series Analysis and Forecasting

Additional Topics in Sampling

Filters