Researchers calculate a 95% confidence interval for the proportion of left-handed Canadian university students as 0.11 ± 0.4. On the basis of this estimation, what is the probability that the actual proportion of left-handed Canadian university students is below 0.07 or greater than 0.15?
A) 0.005
B) 0.025
C) 0.05
D) 0.25

Question

Quizplus · Accepted Answer

A 95% confidence interval means there is a 5% chance that the true proportion lies outside the interval, so the probability of it being below 0.07 or above 0.15 is 0.05.

Researchers Calculate a 95% Confidence Interval for the Proportion of Left-Handed