Generally speaking, the sample size should be increased whenever the population exhibits high variability or whenever high levels of precision and confidence are required.

Question

Quizplus · Accepted Answer

Increasing the sample size can help to reduce the effect of variability on the estimate, as well as improve the precision and accuracy of the estimate. It is especially important when the population is highly variable or when a high level of confidence and precision is necessary.

Generally Speaking, the Sample Size Should Be Increased Whenever the Population