Computing the mean and the deviation
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4. The following return figures were computed using the closing prices obtained from Yahoo Finance website for Harley Davidson (HOG). Please compute the average monthly return for the company and the standard deviation for these monthly returns.
Date HOG Return
9-Feb -17.10%
9-Jan -28.19%
8-Dec 1.64%
8-Nov -30.51%
8-Oct -34.36%
8-Sep -5.46%
8-Aug 5.13%
8-Jul 4.36%
8-Jun -12.05%
8-May 8.68%
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Solution Summary
The solution explains how to calculate the mean and standard deviation of the sample.
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The mean is the sum of the entries S divided by the number of entries N
mean = S /N
In our case, N=10
The sum of the entries is:
S = (-17.1) + (-28.19) + (1.64) + (-30.51) + (-34.36) + (-5.46) + (5.13) + (4.36) - (12.05) + (8.68) = -107.68
mean = ...
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