An analyst is interested in testing the hypothesis Ho: m £ 15000.The data consist of 20 observations of an intervally scaled variable which is normally distributed,but with unknown variance.The correct statistical procedure is
A)z-test.
B)t-test.
C)regression analysis.
D)frequency analysis.
E)chi-square goodness-of-fit test.

Question

Quizplus · Accepted Answer

Since the population variance is unknown, we cannot use a z-test. We can use a t-test for small sample sizes (n < 30), which is appropriate for this scenario with 20 observations. The t-test will allow us to test the hypothesis that the population mean is less than or equal to 15000.

An Analyst Is Interested in Testing the Hypothesis Ho: M