Statistics Sampling Methods & Survey Design

Question 1

Which sampling method assigns each member of the population a unique number and selects individuals using a random number generator?

Accepted Answer

Simple random sampling

Answer

Stratified sampling

Answer

Cluster sampling

Answer

Systematic sampling

Question 2

In systematic sampling, a researcher has a population of 800 and wants a sample of 40. What is the correct sampling interval?

Accepted Answer

20

Answer

10

Answer

40

Answer

80

Question 3

A researcher divides a population by income level and gender, then randomly selects individuals from each group. This technique is known as:

Accepted Answer

Stratified sampling

Answer

Cluster sampling

Answer

Convenience sampling

Answer

Multistage sampling

Question 4

Which sampling method selects naturally occurring groups as the sampling unit rather than selecting individuals directly?

Accepted Answer

Cluster sampling

Answer

Simple random sampling

Answer

Systematic sampling

Answer

Stratified sampling

Question 5

Which sampling approach is most susceptible to producing a biased, non-representative sample?

Accepted Answer

Convenience sampling

Answer

Simple random sampling

Answer

Proportional stratified sampling

Answer

Systematic sampling

Question 6

The complete list of all individuals or units from which a sample will be drawn is called the:

Accepted Answer

Sampling frame

Answer

Population parameter

Answer

Survey instrument

Answer

Confidence interval

Question 7

In proportional stratified sampling, how is the number of individuals selected from each stratum determined?

Accepted Answer

In proportion to the stratum's relative size in the population

Answer

Each stratum contributes an equal number regardless of size

Answer

Based on the researcher's personal judgment

Answer

By selecting only from the largest strata