A sample of size 100 selected from one population has 60 ...

[gonzo233]

A sample of size 100 selected from one population has 60 successes, and a sample of size 150 selected from a second population has 95 successes. The test statistic for testing the equality of the population proportions equal to:
 a. -0.5319.
  b. 0.7293.
  c. -0.419.
  d. 0.2702.

Question 2

When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population proportions. The two sample proportions are p1 = 0.25 and p2 = 0.20, and the standard error of the sampling distribution of p1 - p2 is 0.04 . The calculated value of the test statistic will be:
 a. z = 0.25.
  b. z = 1.25.
  c. t = 0.25.
  d. t = 0.80.

[Harbringer]

Answer to Question 1

A

Answer to Question 2

B