When determining the sample size,the standard deviation may not be known.Which of the following was not mentioned in your text as a way to estimate the standard deviation?
A) estimate from the mean
B) conduct a pilot study
C) estimate based on researcher judgment
D) consult secondary sources

Question

Quizplus · Accepted Answer

Estimating the standard deviation from the mean is not a standard method mentioned for estimating standard deviation when it is unknown. The other options are more commonly used approaches.

When Determining the Sample Size,the Standard Deviation May Not Be