Question: We have a simple random sample X1, ...,15from a Normal population with mean 15 and standard deviation 3. Select from the following, the probability distribution

We have a simple random sample X1, ...,15from a Normal population with mean 15 and standard deviation 3. Select from the following, the probability distribution of: X= (115)(X1+ ... + X15) a. N(0,1) b. N(0, 0.6) c. N(15, 0.6) d. N(15, 9) e. N(15, 0.04)

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