Question

microsoft wants to administer a satisfaction survey to its current customers. using their customer database, the company randomly selects 80 customers and asks them about their level of satisfaction with the company. what type of sampling is used?
a. stratified
b. convenience
c. cluster
d. simple random
e. systematic

Explanation:

• Stratified Sampling: Involves dividing the population into strata (groups) and sampling from each stratum. Here, there's no indication of stratification, so A is incorrect.
• Convenience Sampling: Uses easily accessible individuals. The company is not using convenience; they're using a database to randomly select, so B is incorrect.
• Cluster Sampling: Divides the population into clusters and samples entire clusters. There's no clustering here, so C is incorrect.
• Simple Random Sampling: Each individual in the population has an equal chance of being selected, and the selection is random. Microsoft randomly selects 80 customers from their database, which fits simple random sampling.
• Systematic Sampling: Selects every k-th individual. There's no indication of a systematic interval, so E is incorrect.

Answer:

D. Simple random