If the value of the standardized test statistic is 2.5,
A) conclude that the null hypothesis and the alternative hypothesis are the same.
B) we reject the null hypothesis at the 5% significance level.
C) we fail to reject the null hypothesis at the 5% significance level.
D) we reject the alternative hypothesis at the 5% significance level.
E) we should use a different null hypothesis.

Question

Quizplus · Accepted Answer

A standardized test statistic of 2.5 typically indicates that the observed data are significantly different from what would be expected under the null hypothesis, assuming a normal distribution. At the 5% significance level (which usually corresponds to a critical value of about 1.96 for a two-tailed test), a test statistic of 2.5 would lead to rejecting the null hypothesis.

If the Value of the Standardized Test Statistic Is 2