Question 1

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system. She knows that 2,500 payroll vouchers have been issued since January 1, 2000, and her staff doesn't have time to inspect each voucher. So, she randomly selects 53 as a starting point and orders her staff to inspect the 53rd voucher and each voucher at an increment of 100 (53, 153, 253, etc.). Her sample is a ___.

Accepted Answer

A)  stratified sample 
B)  simple random sample 
C)  convenience sample 
D)  cluster sample 
E)  systematic sample

Question 2

A major limitation of nonrandom samples is that they are not appropriate for most statistical methods.

Accepted Answer

A) True 
 B)False

Question 3

Which one of the following is a reason for conducting a census instead of taking a sample?

Accepted Answer

A)  The sample can save money. 
B)  The sample can save time. 
C)  The population is difficult to access. 
D)  The safety of the consumer. 
E)  none of the above

Question 4

Interviewing all members of a given population is known as

Accepted Answer

A)  a sample. 
B)  a Gallup poll. 
C)  a census. 
D)  an audit. 
E)  none of the above

Question 5

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system. She knows that 2,500 payroll vouchers have been issued since January 1, 2000, and her staff doesn't have time to inspect each voucher. So, she orders her staff to inspect the last 200 vouchers. Her sample is a ___.

Accepted Answer

A)  stratified sample 
B)  simple random sample 
C)  convenience sample 
D)  systematic sample 
E)  cluster sample

Question 6

Financial analyst Larry Potts needs a sample of 100 securities listed on the New York Stock Exchange. In the current issue of the Wall Street Journal, 2,531 securities are listed in the "New York Exchange Composite Transactions," an alphabetical listing of all securities traded on the previous business day. Larry randomly selects the 7th security as a starting point, and selects every 25th security thereafter (7, 32, 57, etc.). His sample is a ___.

Accepted Answer

A)  quota sample 
B)  simple random sample 
C)  stratified sample 
D)  systematic sample 
E)  cluster sample

Question 7

The two major categories of sampling methods are proportionate and disproportionate sampling.

Accepted Answer

A) True 
 B)False

Question 8

Alice Zhong is the VP of operations at Pearl Financial Services. She wants to measure customer satisfaction after a new website and other changes were introduced a few months ago. For this purpose, she instructs her staff to prepare a questionnaire and send it to the first 200 clients in their alphabetical list of active clients. This is an example of ___.

Accepted Answer

A)  simple random sample 
B)  systematic sample 
C)  convenience sample 
D)  stratified sample 
E)  cluster sample

Question 9

Abel Alonzo, Director of Human Resources, is exploring employee absenteeism at the Harrison Haulers Plant. Abel knows that absenteeism varies significantly between departments. For example, workers in the wood shop are absent more than those in the tuning department and the size of the departments ranges from 40 to 120 workers. He orders a random sample of 10 workers from each of the six departments. Abel's sample is a ___.

Accepted Answer

A)  proportionate systematic sample 
B)  proportionate stratified sample 
C)  disproportionate systematic sample 
D)  disproportionate stratified sample 
E)  proportionate cluster sample

Question 10

Sampling errors $\textbf{     cannot    }$  by determined objectively for nonrandom sampling techniques.

Accepted Answer

A) True 
 B)False

Question 11

What is the difference between stratified and cluster sampling? If the objective is to increase precision, which method is preferred?

Accepted Answer

The answer of What is the difference between stratified and...

Question 12

On Saturdays, cars arrive at David Zebda's Scrub and Shine Car Wash at the rate of 80 cars per hour during the ten-hour shift. David wants a sample of 40 Saturday customers to answer the long version of his quality service questionnaire. He randomly selects 9 as a starting point and instructs the crew to select the 9th customer and each customer at intervals of 20 (9, 29, 49, etc.). His sample is a ___.

Accepted Answer

A)  convenience sample 
B)  simple random sample 
C)  unsystematic sample 
D)  stratified sample 
E)  systematic sample

Question 13

On Saturdays, cars arrive at David Zebda's Scrub and Shine Car Wash at the rate of 80 cars per hour during the ten-hour shift. David wants a sample of 40 Saturday customers to answer the long version of his quality service questionnaire. He instructs the Saturday crew to select the first 40 customers. His sample is a ___.

Accepted Answer

A)  convenience sample 
B)  simple random sample 
C)  systematic sample 
D)  stratified sample 
E)  cluster sample

Question 14

In a random sampling technique, every unit of the population has a randomly varying chance or probability of being included in the sample.

Accepted Answer

A) True 
 B)False

Question 15

Abel Alonzo, Director of Human Resources, is exploring employee absenteeism at the Harrison Haulers Plant. Abel knows that absenteeism varies significantly between departments. For example, workers in the wood shop are absent more than those in the tuning department and the size of the departments ranges from 40 to 120 workers. He orders a random sample of 10% of the workers from each of the six departments. Abel's sample is a ___.

Accepted Answer

A)  proportionate systematic sample 
B)  proportionate stratified sample 
C)  disproportionate systematic sample 
D)  disproportionate stratified sample 
E)  proportionate cluster sample

Question 16

Which one of the following is $\textbf{        not }$  a reason for taking a sample instead of conducting a census?

Accepted Answer

A)  The sample can save money. 
B)  The sample can save time. 
C)  The population is difficult to access. 
D)  The safety of the consumer. 
E)  none of the above

Question 17

Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste package. She directs the seven members of her staff to find five households each. Catherine's sample is a ___.

Accepted Answer

A)  cluster sample 
B)  proportionate stratified sample 
C)  quota sample 
D)  disproportionate stratified sample 
E)  simple random sample

Question 18

A carload of steel rods has arrived at Cybermatic Construction Company. The car contains 1,000 bundles of 50 rods each. Claude Ong, manager of Quality Assurance, directs the receiving crew to deliver the 63rd and 458th bundles to his crew for 100% inspection. Claude randomly selected 63 and 458 from a table of random numbers. Claude's sample of 100 rods is a ___.

Accepted Answer

A)  cluster sample 
B)  simple random sample 
C)  quota sample 
D)  systematic sample 
E)  stratified sample

Question 19

In some situations, sampling may be the only option because the population is inaccessible.

Accepted Answer

A) True 
 B)False

Question 20

Albert Abbasi, VP of Operations at Ingleside International Bank, is evaluating the service level provided to walk-in customers. Accordingly, he plans a sample of waiting times for walk-in customers. Albert instructs his staff to record the waiting times for the first 45 walk-in customers arriving after the noon hour. Albert's sample is a ___.

Accepted Answer

A)  simple random sample 
B)  systematic sample 
C)  convenience sample 
D)  stratified sample 
E)  cluster sample

Exam 4: Gathering Data

A major limitation of nonrandom samples is that they are not appropriate for most statistical methods.

Which one of the following is a reason for conducting a census instead of taking a sample?

Interviewing all members of a given population is known as

The two major categories of sampling methods are proportionate and disproportionate sampling.

Sampling errors cannot \textbf{ cannot } cannot by determined objectively for nonrandom sampling techniques.

What is the difference between stratified and cluster sampling? If the objective is to increase precision, which method is preferred?

In a random sampling technique, every unit of the population has a randomly varying chance or probability of being included in the sample.

Which one of the following is not \textbf{ not } not a reason for taking a sample instead of conducting a census?

Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste package. She directs the seven members of her staff to find five households each. Catherine's sample is a ___.

In some situations, sampling may be the only option because the population is inaccessible.

Sampling errors $\textbf{ cannot }$ by determined objectively for nonrandom sampling techniques.

Which one of the following is $\textbf{ not }$ a reason for taking a sample instead of conducting a census?