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 (oF) 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):

83 45 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

Round your answers to 2 decimal places (e.g. 98.76).

(a) Using the entire data, calculate the sample mean and sample standard deviation.

Sample mean = Enter your answer; Using the entire data, calculate the sample mean.

Sample standard deviation = Enter your answer; Using the entire data, calculate the sample standard deviation.

(b) Remove the smallest observation (31F) and calculate the sample mean and sample standard deviation of the remaining data.

Sample mean = Enter your answer; calculate the sample mean of the remaining data

Sample standard deviation = Enter your answer; calculate the sample standard deviation of the remaining data

(c) With the smallest observation removed:

the sample mean Choose your answer; the sample mean

increased

and the sample standard deviation Choose your answer; the sample standard deviation

decreased

.