## Question 858:

1## Answer:

No answer provided yet.We need to compute the 95% confidence interval around the mean.- The confidence interval is twice the margin of error and will get us our answer.
- The margin of error is equal to the standard error of the mean times a critical value from the t-distribution.
- The standard error of the mean is found as the standard deviation of the sample divided by the square root of the sample size.

So we can be 95% confident the actual mean time is between 93.49 minutes and 126.5 minutes. The answer to the question is then 16.5 minutes, or 16 min 30 sec.