A sample of 250 people resulted in a confidence interval estimate for the proportion of people who believe that the federal government's proposed tax increase is justified is between 0.14 and 0.20. Based on this information, what was the confidence level used in this estimation?
A) Approximately 1.59
B) 95 percent
C) Approximately 79 percent
D) Can't be determined without knowing σ.

Question

Quizplus · Accepted Answer

The confidence interval is relatively wide, suggesting a lower confidence level, which is approximately 79 percent.

A Sample of 250 People Resulted in a Confidence Interval