If the sample mean is 7, the hypothesized population mean is 4, and the population standard deviation is 2, compute the test value needed for the z test.
A) 1.50
B) 3.00
C) -3.00
D) -1.50

Question

Quizplus · Accepted Answer

The test value for the z test is calculated as (sample mean - hypothesized population mean) / (population standard deviation / square root of sample size). In this case, the sample mean is 7, the hypothesized population mean is 4, and the population standard deviation is 2. Therefore, the test value is (7 - 4) / (2 / sqrt(1)) = 3.

If the Sample Mean Is 7, the Hypothesized Population Mean