A Sample of Size 150 from Population 1 Has 40

Multiple Choice

A sample of size 150 from population 1 has 40 successes. A sample of size 250 from population 2 has 30 successes. The value of the test statistic for testing the null hypothesis that the proportion of successes in population 1 exceeds the proportion of successes in population 2 by 0.05 is:

A) 1.645.
B) 2.327.
C) 1.960.
D) 1.977.