Question

A simple random sample of 50 adults was surveyed, and it was found that the mean amount of time that they spend surfing the Internet per day is 54.2 minutes, with a standard deviation of 14.0 minutes. What is the 99% confidence interval for the number of minutes that an adult spends surfing the Internet per day?
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A.49.1 minutes to 59.3 minutes
B.50.3 minutes to 58.1 minutes
C.54.2 minutes to 58.1 minutes
D.54.2 minutes to 59.3 minutes

Answer 1

I got C am I right? :)

Answer 2

LOL

Answer 3

sorry