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): 83 49 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 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 = 65.83 Sample standard deviation = (b) Remove the smallest observation (31°F) and calculate the sample mean and sample standard deviation of the remaining data. Sample mean Sample standard deviation-

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