Suppose you take a random sample of 100 students at a university, ask them how many hours they slept last night, and find a mean of 7.1hours and a standard deviation of 1.2hours. You then calculate a 95% confidence interval for the mean number of hours all students from that university slept last night.
-Suppose you constructed a 99% confidence interval with your data instead. How would your 99% confidence interval compare to your 95% confidence interval? Your 99% confidence interval would be:
A) Wider
B) Narrower
C) Same width
D) Cannot be determined with the information provided

Question

Quizplus · Accepted Answer

A 99% confidence interval is wider than a 95% confidence interval because it provides a higher level of confidence, which requires a larger margin of error.

Suppose You Take a Random Sample of 100 Students at a University