All statistical tests,such as calculation of the mean and standard error of the sampling distribution can be calculated and are valid under the following condition(s):
A) the population is normal and the sample is any size
B) the population has an unknown distribution and the sample size is at least 30
C) both a and b
D) either a or b

Question

Quizplus · Accepted Answer

For statistical tests to be valid,either the sample size has to be greater or equal to 30 or the population has to be normally distributed.

All Statistical Tests,such as Calculation of the Mean and Standard