Question

To estimate the percentage of defects in a recent manufacturing​ batch, a quality control manager at Microsoft selects every 17th software CD that comes off the assembly line starting with the sixth until she obtains a sample of 150 software CDs. What type of sampling is​ used? Explain

A. Cluster sampling is used. A population is divided into subgroups called clusters. Then simple random sampling is used to select some of the clusters. All individuals in those selected clusters form the sample.

Answer 1

Systematic sampling is used in this scenario, where the quality control manager selects every 17th software CD starting with the sixth to obtain a sample of 150 software CDs.

Step-by-step explanation:

The type of sampling used in this scenario is systematic sampling. In systematic sampling, the population is ordered in some way, and then individuals are selected at regular intervals. In this case, the manager is selecting every 17th software CD, starting with the sixth. This ensures that every CD has an equal chance of being included in the sample.