For a time study, the three factors that determine how large a sample size to take are
A) the level of confidence, the z-value, and normal time
B) needed accuracy, desired confidence, and standard deviation of the initial sample
C) the level of confidence, the z-value, and the work sampling idle percent
D) actual time, normal time, and standard time
E) actual time, standard time, and mean time

Question

Quizplus · Accepted Answer

The correct factors that determine the sample size for a time study are needed accuracy (how precise the results need to be), desired confidence level (how sure you want to be about the results), and the standard deviation of the initial sample (which measures the variability of the data). These factors directly impact the calculation of sample size in statistical studies, including time studies.

For a Time Study, the Three Factors That Determine How