What would be the lower limit of a confidence interval, at the 95% level of confidence, for the population proportion if a sample of size 100 were to have 30 successes?
A) 0.2102
B) 0.2959
C) 0.3041
D) 0.3898

Question

Quizplus · Accepted Answer

The sample proportion is 0.3 (30/100). Using the formula for the confidence interval for a proportion, the lower limit is calculated as 0.3 - 1.96 * sqrt((0.3*(1-0.3))/100) = 0.2102.

What Would Be the Lower Limit of a Confidence Interval