Question: please answer all and i will upvote Using the sales data in the next table, calculate the mean squared error (MSE). (Hint: The MSE is

please answer all and i will upvote

Using the sales data in the next table, calculate the mean squared error (MSE). (Hint: The MSE is the average of the squared errors.) Using the sales data in the next table, calculate the mean absolute deviation (MAD). (Hint: The MAD is the average of the absolute value of the errors.)

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