Test hypotheses and develop confidence intervals about the difference in two population proportions.

Question

Quizplus · Accepted Answer

The Answer is The population means are analyzed by comparing two sample means.When sample sizes are large (n ≥ 30)and population variances are known,a z test is used.When sample sizes are small,the population variances are known,and the populations are normally distributed,the z test is used to analyze the population means.If the population variances are unknown,and the populations are normally distributed,the t test of means for independent samples is used.For populations that are related on some measure,such as twins or before-and-after,a t test for dependent measures (matched pairs)is used.The difference in two population proportions can be tested or estimated using a z test.

Test Hypotheses and Develop Confidence Intervals About the Difference in Two