Using α = .04, a confidence interval for a population proportion is determined to be .65 to .75. If the level of significance is decreased, the interval for the population proportion _____.
A) becomes narrower
B) becomes wider
C) does not change
D) Not enough information is provided to answer this question.

Question

Quizplus · Accepted Answer

Decreasing the level of significance (α) increases the confidence level, which in turn makes the confidence interval wider because it needs to cover a larger range of values to ensure the same level of confidence.