When testing a single sample mean for significance when the population standard deviation is unknown and sample size is 75,the correct sampling distribution is
A)the t distribution.
B)the Z distribution.
C)it makes no difference.
D)t for a one-tailed test,Z for a two-tailed test.

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown and the sample size is greater than 30, the appropriate sampling distribution is the t distribution. As the sample size is 75, the t distribution should be used.

When Testing a Single Sample Mean for Significance When the Population