We use the t distribution to make a confidence interval for the population mean if the population from which the sample is drawn is (approximately)normally distributed,the population standard deviation is unknown,and the sample size is at least:
A)30
B)100
C)50
D)2

Question

Quizplus · Accepted Answer

The t distribution is used when the population standard deviation is unknown and the sample size is small (typically less than 30). However, it can be used for any sample size as long as the population is approximately normally distributed.

We Use the T Distribution to Make a Confidence Interval