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.
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A graphic depiction of predisposing alleles characteristic of a threshold trait within a population,