statistics and probability

Question

A survey conducted using students from UCC to determine the average travel time to UCC in preparation for the construction of a new shuttle bus terminal to ease pressure on students revealed a mean of 45min plus or minus 12. find the 99% confidence interval from the true mean time to travel to UCC and interpret your results.

Answer 1

Well, when you say +/-12, I'm assuming that you have your margin of error, which is a function of z. So in this case, we know that z is 2.33, so our confidence interval is from 33 minutes to 57 minutes. We can say that we are 99% confident that the average time it takes to get to UCC is between 33 and 57 minutes. You've pretty much had the answer your finger tips based on the information given.