The following data is obtained from a population known to have mean 15 and variance 9. 8.81 15.91 20.39 8.63 13.80 21.73 27.23 7.32 14.83 20.26 (a) Compute the sample mean, median and standard deviation of the data. (b) What is the expected value of the sample mean? What is its variance? (c) What is the sample mean, median and variance of the resistors if all the measured values are tripled? (d) What is the expected value and variance of the sample mean of the resistors if all the measured values are tripled? Edit View Insert Format Tools Table 12pt Paragraph