For a two-tail Z test, the null hypothesis will be rejected at the 0.05 level of significance if the value of the standardised test statistic is:
A)smaller than -1.645.
B)greater than 1.96.
C)smaller than -1.645 or greater than 1.645.
D)smaller than -1.96 or greater than 1.96.

Question

Quizplus · Accepted Answer

For a two-tail Z test with a 0.05 level of significance, we use the critical values of -1.96 and 1.96. If the calculated test statistic falls outside of this range, we reject the null hypothesis. Thus, the correct answer is (D) smaller than -1.96 or greater than 1.96.

For a Two-Tail Z Test, the Null Hypothesis Will Be