1. A Benchmark company is testing Computer Power Supply Unit (PSU) of two different companies X and Y. PSUs were tested at the 120% stress to check for the overvoltage protection. The following data given in Table 1, represent time to failure (in hours) for random samples taken from the days' production of the companies. Table 1: Failure time in hours) of PSU of X and Y Company Company Failure time (in hours) 2.05 1.03 1.18 0.80 ? 0.54 1.80 4.52 1.33 1.29 1.11 3.34 1.54 0.08 4.12 0.60 0.72 0.92 1.05 1.66 3.03 1.81 2.17 0.63 0.56 5.03 0.09 0.18 0.34 1.51 1.45 Y 1.52 0.19 1.55 0.02 0.07 3.65 0.40 0.24 1.66 1.45 1.60 1.80 4.69 0.08 7.89 1.58 0.64 0.03 0.23 0.72 a) What are the sample size of the company X & Y? b) Compute the sample mean, variance, and standard deviation for the time to failure for company X. c) Compute the sample mean, variance, and standard deviation for the time to failure for company Y. d) Compute the Coefficient of variation for the time to failure for company X. e) Compute the Coefficient of variation for the time to failure for company Y. f) Which measure one should consider to compare the performance / consistency of the product of the two company? And why? g) Which company's product is more consistent in their performance?