Question 1

A bivariate data set has only two observations on a variable.

Accepted Answer

A) True 
 B)False

Question 2

An observation in a data set would refer to

Accepted Answer

A) only a variable whose value is recorded by visual inspection. 
B) a data item whose value is numerical (as opposed to categorical). 
C) a single row that contains one or more observed variables. 
D) the values of all the variables in the entire data set. 
A) only a variable whose value is recorded by visual inspection. 
B) a data item whose value is numerical (as opposed to categorical). 
C) a single row that contains one or more observed variables. 
D) the values of all the variables in the entire data set.

Question 3

A reliable survey is one that

Accepted Answer

A) is administered by trusted employees. 
B) has been approved by quality engineers. 
C) gives consistent measurements. 
D) has many easy questions. 
A) is administered by trusted employees. 
B) has been approved by quality engineers. 
C) gives consistent measurements. 
D) has many easy questions.

Question 4

Which is a discrete variable?

Accepted Answer

A) The time it takes to put on a pair of jeans 
B) The price you paid for your last pair of jeans 
C) The distance to the store where you purchased your last pair of jeans 
D) The number of pairs of jeans that you own 
A) The time it takes to put on a pair of jeans 
B) The price you paid for your last pair of jeans 
C) The distance to the store where you purchased your last pair of jeans 
D) The number of pairs of jeans that you own

Question 5

The level of measurement for categorical data is nominal.

Accepted Answer

A) True 
 B)False

Question 6

Sampling bias can best be reduced by

Accepted Answer

A) using appropriate data coding. 
B) having a computer tabulate the results. 
C) utilizing random sampling. 
D) taking a judgment sample. 
A) using appropriate data coding. 
B) having a computer tabulate the results. 
C) utilizing random sampling. 
D) taking a judgment sample.

Question 7

A problem with judgment sampling is that the sample may not reflect the population.

Accepted Answer

A) True 
 B)False

Question 8

Which is not a time series variable?

Accepted Answer

A) Closing checkbook balances of 30 students on December 31 of this year 
B) Net earnings reported by Xena Corp.for the last 10 quarters 
C) Dollar/euro exchange rates at 12 noon GMT for the last 30 days 
D) Movie attendance at a certain theater for each Saturday last year 
A) Closing checkbook balances of 30 students on December 31 of this year 
B) Net earnings reported by Xena Corp.for the last 10 quarters 
C) Dollar/euro exchange rates at 12 noon GMT for the last 30 days 
D) Movie attendance at a certain theater for each Saturday last year

Question 9

Internet surveys posted on popular websites suffer from nonresponse bias.

Accepted Answer

A) True 
 B)False

Question 10

Your telephone area code is an example of a(n)________ variable.

Accepted Answer

A) nominal 
B) ordinal 
C) interval 
D) ratio 
A) nominal 
B) ordinal 
C) interval 
D) ratio

Question 11

Which is a categorical variable?

Accepted Answer

A) The brand of jeans you usually wear 
B) The price you paid for your last pair of jeans 
C) The distance to the store where you purchased your last pair of jeans 
D) The number of pairs of jeans that you own 
A) The brand of jeans you usually wear 
B) The price you paid for your last pair of jeans 
C) The distance to the store where you purchased your last pair of jeans 
D) The number of pairs of jeans that you own

Question 12

Analysis of month-by-month changes in stock market prices during the most recent recession would require the use of time series data.

Accepted Answer

A) True 
 B)False

Question 13

It is better to attempt a census of a large population instead of relying on a sample.

Accepted Answer

A) True 
 B)False

A bivariate data set has only two observations on a variable.

An observation in a data set would refer to

A reliable survey is one that

Which is a discrete variable?

The level of measurement for categorical data is nominal.

Sampling bias can best be reduced by

A problem with judgment sampling is that the sample may not reflect the population.

Which is not a time series variable?

Internet surveys posted on popular websites suffer from nonresponse bias.

Your telephone area code is an example of a(n)________ variable.

Which is a categorical variable?

Analysis of month-by-month changes in stock market prices during the most recent recession would require the use of time series data.

It is better to attempt a census of a large population instead of relying on a sample.

Overview of Statistics

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters

Exam 2: Data Collection

A bivariate data set has only two observations on a variable.

An observation in a data set would refer to

A reliable survey is one that

Which is a discrete variable?

The level of measurement for categorical data is nominal.

Sampling bias can best be reduced by

A problem with judgment sampling is that the sample may not reflect the population.

Which is not a time series variable?

Internet surveys posted on popular websites suffer from nonresponse bias.

Your telephone area code is an example of a(n)________ variable.

Which is a categorical variable?

Analysis of month-by-month changes in stock market prices during the most recent recession would require the use of time series data.

It is better to attempt a census of a large population instead of relying on a sample.

Overview of Statistics

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters