Which of the following statements is true about critical z?
A) Critical z is a probability that spans the rejection area in the sampling distribution.
B) Critical z is a standardized value that is determined by the chosen alpha level.
C) Critical z is an unstandardized value that is determined by the chosen sample size.
D) Critical z is a probability that is the same as the p-value of a test.

Question

Quizplus · Accepted Answer

Critical z is a standardized value that is determined by the chosen alpha level. It is the value of the test statistic that corresponds to the boundary between the rejection region and the non-rejection region in the sampling distribution. The alpha level is the predetermined level of significance that is used to determine if the test statistic is significant or not. The critical z value is calculated using this alpha level and the standard normal distribution to determine the cutoff point for rejecting or accepting the null hypothesis.

Which of the Following Statements Is True About Critical Z