When a computed z value (for a test for differences between two percentages), 4.21, is larger than the standard z value, 1.96, then this amounts to:
A) support for the null hypothesis; the two percentages are differen.t
B) no support for the null hypothesis; the two percentages are NOT different.
C) support for the null hypothesis; the two percentages are NOT different.
D) no support for the null hypothesis; the two percentages are different.
E) having to recalculate as the z value is not utilized for testing the differences between two percentages.

Question

Quizplus · Accepted Answer

A computed z value larger than the standard z value indicates that the difference between the two percentages is statistically significant and provides evidence against the null hypothesis. Therefore, there is no support for the null hypothesis, and the two percentages are likely different.

When a Computed Z Value (For a Test for Differences