Similarly, the z-test for means can be applied using the following:
The hypotheses tested are typically:
H0: μ1 = μ2 that is, the two samples’ means are statistically similar
Ha: μ1 ≠ μ2 that is, the two samples’ means are statistically significantly different
This test is the alternative to the unequal variances t-test whenever both n1 and n2 ≥ 30.
The test can also be performed using ROV BizStats.
Figure 9.12: ROV BizStats’ Z-Test for Proportions