If a 90% confidence interval estimate for the difference between two population proportions is to be constructed, what would the confidence coefficient be?
A) 0.90
B) 0.45
C) 0.10
D) 0.05

Question

Quizplus · Accepted Answer

The confidence coefficient is equal to 1 minus the level of significance or alpha, which is usually set at 0.10, 0.05, or 0.01. For a 90% confidence interval, the level of significance would be 0.10, so the confidence coefficient would be 1 - 0.10 = 0.90.

If a 90% Confidence Interval Estimate for the Difference Between