C 3.2 MTH 265 - MTH 265 Spring 2022, section 20651, Spring 2022 | We... Watch It Player | Cengage Learning how to take the square root on a ti 36x pro - Google Search Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for Vanguard Total Stock Index (all stocks). Let y be a random variable epresenting annual return for Vanguard Balanced Index (60% stock and 40% bond). For the past several years, we have the following data. x: 14 0 32 23 13 35 17 -16 -15 -24 y: 24 -1 8 24 21 24 19 -2 -2 -1 In USE SALT (a) Compute Ex, Ex2, Ey, Ey2. Ex 79 Ex 2 X Ey Ey2 (b) Use the results of part (a) to compute the sample mean, variance, and standard deviation for x and for y. (Round your answers to four decimal places.) X (c) Compute a 75% Chebyshev interval around the mean for x values and also for y values. (Round your answers to two decimal places.) X Lower Limit Upper Limit Use the intervals to compare the two funds. 75% of the returns for the balanced fund fall within a narrower range than those of the stock fund. 75% of the returns for the stock fund fall within a narrower range than those of the balanced fund. 25% of the returns for the balanced fund fall within a narrower range than those of the stock fund. 25% of the returns for the stock fund fall within a wider range than those of the balanced fund. (d) Compute the coefficient of variation for each fund. (Round your answers to the nearest whole number.)