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Show your work. Explain so I can learn. A population of scores forms a normal discribution with u = 80 with o = 20. a)

Show your work. Explain so I can learn.

A population of scores forms a normal discribution with u = 80 with o = 20. a) What's the probability of selecting a score larger than X-86? (4 points) b) What's the X score separate top 5% from the rest? (4 points) c) What's the probability of selecting a sample of n=25 scores with a mean less than M-86? (8 points)

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