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Please help me to answer a Finance Question
發問:
Suppose that the returns on an investment are normally distributed with an expected return of 10% and standard deviation of 5%. What is the likelihood of making a positive return? (Hint: the area under a curve for 1 std dev is 34.13%, 2 std dev is 47.73%, and 3 std dev is 49.87%.)
最佳解答:
The mean is 10%. 2 x standard deviation = 2 x 5% = 10%. So anything smaller than negative two standard deviations will give you negative return (return
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