The results of both one-sample Z- and t-test are basically the same.

Question

Quizplus · Accepted Answer

Both one-sample Z-test and t-test are used to test hypotheses about the population mean when the population standard deviation is known and unknown respectively. Both tests are used to test the significance of the difference between a sample mean and a hypothesized population mean. In situations where the sample size is large (n > 30), the results of both tests are usually similar. However, when the sample size is small (n < 30) and the population standard deviation is unknown, the t-test should be used instead of the Z-test, and the results may differ slightly.

The Results of Both One-Sample Z- and T-Test Are Basically