Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. The following data are the joint temperatures of the O-rings (F) for each test firing or actual launch of the space shuttle rocket motor (from Presidential Commission on the Space Shuttle Challenger Accident, Vol. 1, pp. 129-131) 84, 48, 61, 40,83,67,45,66,70,69,80,58,68,60,67,72,73, 70,57,63,70,78,52,67,53,67,75,61,70,81,76, 79,75,76,58,31. Set aside the smallest observation (31F) and re-compute the sample mean and sample standard deviation. Note the difference from the answers in part 1. Round your answers to 2 decimal places. (c) Calculate the sample mean (d) Calculate the sample standard deviation