(Answered) Assume the sweatshirt test scores are normally distributed

Finance

Assume the sweatshirt test scores are normally distributed with a mean of 500 and a standard deviation of 100.

(a) Consider all random samples of 100 test scores. What is the standard deviation of the sample means?

(b) What is the probability that 100 randomly selected test scores will have a mean test score that is between 490 and 510?

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