Question: a] What is the average time to prepare a return in hours? [4 points] b] If each type of return takes exactly its average time,

a] What is the average time to prepare a return in hours? [4 points] b] If each type of return takes exactly its average time, what is the standard deviation of the time to prepare the average return? [3 points] Hint: The standard deviation is the square root of the variance. The variance is given by the weighted average squared deviation from the mean. That is, the standard deviation is

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