A corporation wishes to estimate the average amount of time office workers spend browsing the web instead of working. In a sample of 15 workers, the average amount of time spent browsing in an 8-hour day was 27.9 minutes with a standard deviation of 8.3 minutes. The variable (minutes spent browsing) was normally distributed.

Construct an 99% confidence interval for the mean amount of time spent browsing the web instead of working for all office workers.

The lower limit will be . Round to the nearesttenth.

The upper limit will be . Round to the nearest tenth.

If the answer cannot be determined, type 123456.