X: 11 0 36 21 31 23 24 -11 -11 -21
y: 10 -2 29 14 22 18 14 -2 -3 -10
a) Compute Ex, Ex^2, Ey, Ey^2
b) Find mean, variance, standard deviation.
c) Compute 75% chebyshev interval around the mean of x and y values. Use the intervals to compare two funds.
d) Compute the coefficient of variationof each fund. If s represents risks and the x(mean) represents expected return, then sx can be the measure of risk per unit of expected return. Why is the smaller cv better?
Knowing the mean and the standard deviation Chebyshev’s interval and coefficient of variation have been computed.