2. On a standardized test, Sara had a score of 81, which was exactly 2 standard deviations below the mean. If the standard deviation for the test is 3, what is the mean score for the test?

A line for tickets to a broadway show had a mean waiting time of 20 minutes with a statistic deviation of 5 minutes. What Percentage of People in line waited for more than 28 minutes?

The local pilots association examined records from this year's census of its members. Tom is a member, and the census shows that he has 4210 hours of flight experience. The census also shows that among all members of the association the mean flight experience is 3095 hours with a standard deviation of 679 hours. Find the z-score of Tom's flight experience relative to the flight experiences of all the members of the pilots association. Round your answer to two decimal places.

Jason's z- score in the 10-k run was -3. if the raw score standard deviation was 5, and the mean running time for the competitors was 55 minutes, what was Jason's raw score running time?