The accuracy of a labor standard is to be within ± 5%,and the confidence level is 95%.The standard deviation of the sample is 2 and the mean is 8.What sample size should be used?
A)8
B)10
C)96
D)127
E)68

Question

Quizplus · Accepted Answer

The sample size can be calculated using the formula: n = (Z^2 * s^2) / (E^2 * μ^2)where:n is the sample sizeZ is the z-score for the desired confidence levels is the sample standard deviationE is the margin of errorμ is the population meanPlugging in the given values, we get:n = (1.96^2 * 2^2) / (0.05^2 * 8^2) = 96Therefore, the correct answer is C) 96.

The Accuracy of a Labor Standard Is to Be Within