Consider three stock funds, which we will call Stock Funds 1, 2, and 3. Suppose that Stock Fund 1 has a mean yearly return of 8.
00 percent with a standard deviation of 16.30 percent; Stock Fund 2 has a mean yearly return of 11.40 percent with a standard deviation of 18.80 percent, and Stock Fund 3 has a mean yearly return of 13.10 percent with a standard deviation of 8.90 percent. (a) For each fund, find an interval in which you would expect 95.44 percent of all yearly returns to fall. Assume returns are normally distributed. (Round your answers to 2 decimal places. Negative amounts should be indicated by a minus sign.) Fund 1: [ 8.00 , 16.30 ] Fund 2: [ 11.40 , 18.80 ] Fund 3: [ 13.10 , 8.90 ] (b) Using the intervals you computed in part a, compare the three funds with respect to average yearly returns and with respect to variability of returns. Fund 1 has the average and the variability. Fund 2 has the average and the variability. Fund 3 has the average return and the variability. (c) Calculate the coefficient of variation for each fund, and use your results to compare the funds with respect to risk. Which fund is riskiest
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Answer:
[-20.25;+∞).
Step-by-step explanation:
1) according to the properties of the given parabola the minimum is:
2) y₀=-20.25 means, the value -20.25 is minimum of the range, the maximum →+∞;
3) finally, the range y≥-20.25.