Which of the following hypothesis tests is used to test the difference of a sample mean x-bar with a known population mean and known population sigma?
A)One sample t-test.
B)Two sample test.
C)Paired t-test.
D)One sample z-test.

Question

Quizplus · Accepted Answer

The one sample z-test is used to test the difference of a sample mean x-bar with a known population mean and known population sigma. The t-test is used to test the mean of a small sample with a normal distribution against a specified value. The paired t-test is used when the test units can be paired. The two sample tests are used for small samples of 30 or less to determine if numbers come from the same population.

Which of the Following Hypothesis Tests Is Used to Test