If a pilot sample is not available, it is recommended to set the sample proportion equal to 0.50 to calculate the required sample size for a confidence interval for the proportion.

Question

Quizplus · Accepted Answer

When no pilot sample or prior estimate of the population proportion is available, setting the sample proportion to 0.50 is recommended because it maximizes the sample size calculation, ensuring that the calculated sample size is sufficient for a wide range of actual proportions.

If a Pilot Sample Is Not Available, It Is Recommended