When conducting a hypothesis test concerning the population mean, and the population standard deviation is known, the value of the test statistic is calculated as ________. A) z = B) t_df = C) z = D) t_df =

Question

Quizplus · Accepted Answer

When the population standard deviation is known, we use a z-test to test the hypothesis about population mean. The value of the test statistic is calculated using the formula z = (x̄ - μ)/(σ/√n), where x̄ is the sample mean, μ is the hypothesized population mean, σ is the population standard deviation, and n is the sample size. Thus, the correct choice is A, as it represents the formula for calculating the z-test statistic.

When Conducting a Hypothesis Test Concerning the Population Mean, and the Population