You want to be 95% confident that the sample variance is within 40% of the population variance. Find the appropriate minimum sample size.
A) 57
B) 224
C) 14
D) 11

Question

Quizplus · Accepted Answer

To determine the minimum sample size for a given confidence level and margin of error for variance, we use the chi-square distribution. For a 95% confidence level and a margin of error of 40%, the calculation results in a minimum sample size of approximately 57.

You Want to Be 95% Confident That the Sample Variance