In a two-tail test for the population mean,the null hypothesis will be rejected at α level of significance if the value of the standardized test statistic z is such that: A)z zα B)z

Question

In a two-tail test for the population mean,the null hypothesis will be rejected at α level of significance if the value of the standardized test statistic z is such that: A)z > zα B)z < −zα C)−zα < z < zα D)| z | > zα_{/ 2}

Quizplus · Accepted Answer

In a two-tailed test, the null hypothesis is rejected if the absolute value of the test statistic, |z|, is greater than the critical value, zα/2, which corresponds to the tails of the distribution. This is because the significance level, α, is split between the two tails in a two-tailed test.

In a Two-Tail Test for the Population Mean,the Null Hypothesis