Question 1

Which of the following best describes a Simple Random Sample (SRS)?

Accepted Answer

A sample where every member of the population has an equal chance of being selected.

Question 2

A bakery selects every 12th cookie produced to inspect for defects. Which sampling method is being used?

Accepted Answer

Systematic Sampling

Question 3

A college professor wants feedback from her statistics course and decides to survey 5 random students out of the 20 enrolled. Which method could she use to generate a simple random sample?

Accepted Answer

Use a random digit table

Question 4

A regional manager wants to survey 10 random employees in each branch of a chain restaurant. What sampling method is this?

Accepted Answer

Stratified Sampling

Question 5

A quality control manager selects every tenth product off the line to inspect for defects. What type of sampling method is this?

Accepted Answer

Systematic Sampling

Question 6

Which of the following scenarios best illustrates cluster sampling?

Accepted Answer

Randomly select 3 classes in a school and survey each student in those classes.

Question 7

A hospital administrator wants to survey nurses about a new policy. She divides nurses into groups based on their department and randomly selects nurses from each department. What sampling method is this?

Accepted Answer

Stratified Sampling

Question 8

Which of the following is NOT a requirement for a sample to be considered a Simple Random Sample?

Accepted Answer

The sample must be representative of all subgroups.

Question 9

A school system wants to know how teachers feel about professional development. They randomly select 60 teachers, but only 5 teachers from each grade are chosen. Is this a simple random sample?

Accepted Answer

No, because the sample was stratified by grade.

Question 10

A researcher wants to estimate the average commute time for employees at a large company. She randomly selects 100 employees from a list of all employees. What type of sampling is this?

Accepted Answer

Simple Random Sampling

Question 11

Which formula represents the probability of selecting a specific individual in a simple random sample of size $$n$$ from a population of size $$N$$?

Accepted Answer

$$P = \frac{1}{N}$$

Question 12

A manager wants to estimate the average number of defective products produced per day. She selects every 20th product off the line and inspects it. What sampling method is this?

Accepted Answer

Systematic Sampling

Question 13

Which of the following is a disadvantage of simple random sampling in large populations?

Accepted Answer

It can be impractical due to the need for a complete list of the population.

Question 14

A company wants to survey employees about job satisfaction. They divide employees by department and randomly select 10 employees from each department. What sampling method is this?

Accepted Answer

Stratified Sampling

Question 15

A researcher randomly selects 5 cities and surveys every household in those cities. What sampling method is being used?

Accepted Answer

Cluster Sampling

Question 16

Which sampling method is most appropriate when the population is naturally divided into groups and you want to survey all members of selected groups?

Accepted Answer

Cluster Sampling

Question 17

A manager uses a random number generator to select 15 employees for a satisfaction survey. What sampling method is this?

Accepted Answer

Simple Random Sampling

Question 18

A quality control manager wants to know how many defective products come off the line on average per day. She uses a random number generator to select 100 of the 1000 units produced that day and tests whether they are defective. What type of sampling method is this?

Accepted Answer

Simple Random Sampling

Question 19

A regional branch manager wants to survey a sample of employees working in three locations of a chain restaurant. Which of the following sampling strategies best matches cluster sampling?

Accepted Answer

Randomly select one location and survey every employee in that location.

Question 20

Which of the following statements about representative samples is TRUE?

Accepted Answer

A representative sample reflects the characteristics of the original population.

Sampling Methods in Statistics: Simple Random and Other Sampling Techniques

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