Question 1

Which is most nearly correct regarding sampling error?

Accepted Answer

A)   It can be eliminated by increasing the sample size.
B)   It cannot be eliminated by any statistical sampling method.
C)   It can be eliminated by using Excel's =RANDBETWEEN() function.
D)   It can be eliminated by utilizing systematic random sampling.

Question 2

To measure satisfaction with its cell phone service,AT&T takes a stratified sample of its customers by age,gender,and location.Which is an advantage of this type of sampling,as opposed to other sampling methods?

Accepted Answer

A)   It is less intrusive on customers' privacy.
B)   It does not require random numbers.
C)   It gives faster results.
D)   It can give more accurate results.

Question 3

Judgment sampling and convenience sampling are non-random sampling techniques.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

The Statistical Abstract of the United States is a huge annual compendium of data for the United States and it is available online free of charge.

Accepted Answer

A) True 
 B)False

Question 6

A stratified sample is sometimes recommended when:

Accepted Answer

A)   the sample size is very large.
B)   the population is small compared to the sample.
C)   distinguishable strata can be identified in the populations.
D)   the population is spread out geographically.

Question 7

This year,Oxnard University produced two football All-Americans.This is an example of continuous data.

Accepted Answer

A) True 
 B)False

Question 8

The number of passengers "bumped" on a particular airline flight is ____________ data.

Accepted Answer

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

Question 9

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

Question 10

If you randomly sample 50 students about their favorite places to eat,the data collected would be referred to as cross-sectional data.

Accepted Answer

A) True 
 B)False

Question 11

A worker collecting data from every other shopper who leaves a store is taking a simple random sample of customer opinion.

Accepted Answer

A) True 
 B)False

Question 12

A multivariate data set contains:

Accepted Answer

A)   more than two observations.
B)   more than two categorical variables.
C)   more than two variables.
D)   more than two levels of measurement.

Question 13

Which of the following is not true?

Accepted Answer

A)   Categorical data have values that are described by words rather than numbers.
B)   Categorical data are also referred to as nominal or qualitative data.
C)   The number of checks processed at a bank in a day is categorical data.
D)   Numerical data can be either discrete or continuous.

Question 14

An investment firm rates bonds for AardCo Inc.as "B+" while bonds of Deva Corp.are rated "AA." Which level of measurement would be appropriate for such data?

Accepted Answer

A)   Nominal
B)   Ordinal
C)   Interval
D)   Ratio

Question 15

The type of statistical test that we can perform is independent of the level of measurement of the variable of interest.

Accepted Answer

A) True 
 B)False

Question 16

Explain the concept of a focus group.In what ways does a focus group resemble a survey? Why is a moderator desirable? What else is required to make a successful focus group?

Accepted Answer

Data collected in a focus group are rich...

Question 17

Ratio data are distinguished from interval data by the presence of a zero reference point.

Accepted Answer

A) True 
 B)False

Question 18

Which survey method would you recommend to survey opinions of airline passengers about the cleanliness of the restrooms in the Detroit airport? Why not the others?

Accepted Answer

Restroom users are usually in a hurry an...

Question 19

Which statement is correct?

Accepted Answer

A)   Selecting every fifth shopper arriving at a store will approximate a random sample of shoppers.
B)   Selecting only shoppers who drive SUVs is a stratified sampling method.
C)   A census is preferable to a sample for most business problems.
D)   Stratified samples are usually cheaper than other methods.

Question 20

Numerical data can be either discrete or continuous.

Accepted Answer

A) True 
 B)False

Exam 2: Data Collection

The number of passengers "bumped" on a particular airline flight is ____________ data.

Correct AnswerverifiedShow Answer

The type of statistical test that we can perform is independent of the level of measurement of the variable of interest.

Correct AnswerverifiedShow Answer

Explain the concept of a focus group.In what ways does a focus group resemble a survey? Why is a moderator desirable? What else is required to make a successful focus group?

Correct AnswerverifiedData collected in a focus group are rich...View AnswerShow Answer

Which is most nearly correct regarding sampling error?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A multivariate data set contains:

Correct AnswerverifiedShow Answer

Ratio data are distinguished from interval data by the presence of a zero reference point.

Correct AnswerverifiedShow Answer

Judgment sampling and convenience sampling are non-random sampling techniques.

Correct AnswerverifiedShow Answer

Numerical data can be either discrete or continuous.

Correct AnswerverifiedShow Answer

An investment firm rates bonds for AardCo Inc.as "B+" while bonds of Deva Corp.are rated "AA." Which level of measurement would be appropriate for such data?

Correct AnswerverifiedShow Answer

If you randomly sample 50 students about their favorite places to eat,the data collected would be referred to as cross-sectional data.

Correct AnswerverifiedShow Answer

This year,Oxnard University produced two football All-Americans.This is an example of continuous data.

Correct AnswerverifiedShow Answer

To measure satisfaction with its cell phone service,AT&T takes a stratified sample of its customers by age,gender,and location.Which is an advantage of this type of sampling,as opposed to other sampling methods?

Correct AnswerverifiedShow Answer

Which statement is correct?

Correct AnswerverifiedShow Answer

Which survey method would you recommend to survey opinions of airline passengers about the cleanliness of the restrooms in the Detroit airport? Why not the others?

Correct AnswerverifiedRestroom users are usually in a hurry an...View AnswerShow Answer

The Statistical Abstract of the United States is a huge annual compendium of data for the United States and it is available online free of charge.

Correct AnswerverifiedShow Answer

A stratified sample is sometimes recommended when:

Correct AnswerverifiedShow Answer

A worker collecting data from every other shopper who leaves a store is taking a simple random sample of customer opinion.

Correct AnswerverifiedShow Answer

Which of the following is not true?

Correct AnswerverifiedShow Answer

Which is a categorical variable?

Correct AnswerverifiedShow Answer

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Data collected in a focus group are rich...
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Restroom users are usually in a hurry an...
View Answer

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