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A random variable X is normally distributed with mean 29 and a standard deviation 3.2. round all answers to 3 decimal places (a) if a

A random variable X is normally distributed with mean 29 and a standard deviation 3.2. round all answers to 3 decimal places (a) if a random sample size n=3 is selected, find the standard error. (b) if a random sample size n=21 is selected, find the standard error. (c) (a) if a random sample size n=30 is selected, find the standard error

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