Question: 8.9 Let X1, X2, ..., X, be the n elements in the R vector x. Write an R function named mad for mean absolute deviation)

8.9 Let X1, X2, ..., X, be the n elements in the R vector x. Write an R function named mad for mean absolute deviation) with a single argument x that calculates :-* where X is the sample mean. en with a single vector argument x that calculates and returns

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