An increase in the desired confidence level has what effect on the number of observations necessary in a time study?
A)Increases
B)Decreases
C)Unaffected
D)May increase or decrease,depending on the sample standard deviation
E)Impossible to say without additional information

Question

Quizplus · Accepted Answer

Increasing the desired confidence level increases the margin of error, which in turn requires a larger sample size to maintain the same level of precision in the estimate. Therefore, the number of observations necessary in a time study increases.

An Increase in the Desired Confidence Level Has What Effect