When small samples are used to estimate the true population mean where the population standard deviation is unknown, the standard normal distribution must be used to obtain the critical value.

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown and small samples are used, the t-distribution must be used to obtain the critical value. The t-distribution takes into account the added uncertainty due to using a small sample size.

When Small Samples Are Used to Estimate the True Population