Deck 4: Gathering Data

Question 1

Interviewing all members of the population is known as

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

Answer 1

a census.

Question 2

If every unit of the population has the same probability of being selected to the sample, then the researcher is probably conducting random sampling.

Answer 2

True

Question 3

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

Answer 3

False

Question 4

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

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 5

If a researcher selects every k^th item from a population of N items, then she is likely conducting a systematic random sampling.

Question 6

Interviewing all members of a given population is known as

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

Question 7

Saving time and money are reasons to take a sample rather than do a census.

Question 8

A population list, map, directory, or other source used to represent the population from which a sample is taken is called a frame.

Question 9

The directory or map from which a sample is taken is called the census.

Question 10

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

Question 11

Systematic sampling is a type of random sampling technique.

Question 12

A nonrandom sampling technique that is similar to stratified random sampling is called quota sampling.

Question 13

With cluster sampling, there is homogeneity within a subgroup or stratum.

Question 14

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

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 15

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

Question 16

The process of drawing a sample for a given a population is known as

A) sampling.
B) census.
C) survey.
D) quota.
E) none of the above

Question 17

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

Question 18

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

Question 19

Cluster (or area) sampling is a type of random sampling technique.

Question 20

If every unit of the population has the same probability of being selected to the sample, then the researcher is conducting random sampling.

Question 21

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 ___.

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

Question 22

A carload of palletized aluminum castings has arrived at Mansfield Motor Manufacturers. The car contains 1,000 pallets of 100 castings each. Mario Munoz, manager of Quality Assurance, directs the receiving crew to deliver the 127th and 869th pallets to his crew for 100% inspection. Mario randomly selected 127 and 869 from a table of random numbers. Mario's sample of 200 castings is a ___.

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

Question 23

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 ___.

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

Question 24

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 ___.

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

Question 25

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 ___.

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

Question 26

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 clients that access the company's website during from 8 a.m. to 9 a.m. for the next four weeks. This is an example of ___.

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

Question 27

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 ___.

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

Question 28

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 randomly selects 4 as a starting point and instructs his staff to record the waiting times for the 4th walk-in customer and every 10th customer thereafter (4, 14, 24, etc.). Albert's sample is a ___.

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

Question 29

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 ___.

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

Question 30

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 ___.

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

Question 31

Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste package. She chooses thirty-six of her closest friends. Catherine's sample is a ___.

A) cluster sample
B) convenience sample
C) quota sample
D) systematic sample
E) random sample

Question 32

Paige DeMarco is the Vice President for University Advancement at State University. She is responsible for the capital campaign to raise money for the new student services building. Paige selects the first 100 alumni listed on a web-based social networking site for State University. She intends to contact these individuals regarding possible donations. Her sample is a ___.

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

Question 33

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 ___.

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

Question 34

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 ___.

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

Question 35

Paige DeMarco is the Vice President for University Advancement at State University. She is responsible for the capital campaign to raise money for the new student services building. Paige plans to target alumni and acquires her sampling frame from the State University Office of Alumni Relations. She intends to contact these individuals regarding possible donations. Paige chooses her sample by selecting six-digit numbers (1 to 150,000) from a random number table. Her sample is a ___.

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

Question 36

Financial analyst Larry Potts needs a sample of 100 securities listed on either the New York Stock Exchange (NYSE) or the American Stock Exchange (AMEX). According to the Wall Street Journal's "Stock Market Data Bank," 2,531 NYSE securities and AMEX 746 securities were traded on the previous business day. Larry directs his staff to randomly select 77 NYSE and 23 AMEX securities. His sample is a ___.

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

Question 37

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 ___.

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

Question 38

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 ___.

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

Question 39

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 uses a table of random numbers to select 100 numbers between 1 and 2,531. His sample is a ___.

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

Question 40

Paige DeMarco is the Vice President for University Advancement at State University. She is responsible for the capital campaign to raise money for the new student services building. Paige plans to target alumni and acquires her sampling frame from the State University Office of Alumni Relations. She intends to contact these individuals regarding possible donations. She randomly selects the sixth name as a starting point and then selects every 100th subsequent name (106, 206, 306, etc.). Her sample is a ___.

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

Question 41

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 uses random five-digit numbers from the website random.org (which offers true random numbers on the Internet). This is an example of ___.

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

Question 42

What is the difference between a census and a sample?

Question 43

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. 28% of clients are from the healthcare industry, 35% are manufacturing companies, 27% are financial firms, and 7% are construction companies. For this purpose, she gets random five-digits numbers from the website random.org (which offers true random numbers on the Internet). Then she uses these numbers to select 140 random clients from the healthcare sector, 175 from the manufacturing sector, 135 from the manufacturing sector, and 35 from the construction sector. This is an example of ___.

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

Question 44

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