Question: A random sample of n - 100 observations is selected from a population with mean 20 and standard deviation 15. What is the probability of

A random sample of n - 100 observations is selected from a population with mean 20 and standard deviation 15. What is the probability of observing a mean greater than 21 O 0.2847 O 0.2508 O 0.2514 O 0,7475 O 0.4734

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