Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for the Vanguard Total Stock Index (all Stocks). Let y be a random variable representing annual return for the Vanguard Balanced Index (60% stock and 40% bond). For the past several years, , assume the following data. Compute a 75% Chebyshev interval around the mean for x-values and also for y- values. Round your answers to the nearest hundredth. 13 0 36 22 34 24 25 -13 -13 -22 X. 10 -5 26 16 23 17 16 -5 -6 -10 O for x-values: -10.20 to 52.20 and for y-values: -5.21 to 35.02 O for x-values: -31.00 to 24.01 and for y-values: -18.62 to 21.61 O for x-values: -31.00 to 52.20 and for y-values: -18.62 to 35.02 O for x-values: -31.00 to 24.01 and for y-values: -5.21 to -16.22 O for x-values: -18.62 to 35.02 and for y-values: -31.00 to 52.20