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please answer for 8 and 9 and explain why. 8. What z scores separate the middle 72% of a normal distribution from the rest? (2

please answer for 8 and 9 and explain why.

8. What z scores separate the middle 72% of a normal distribution from the rest? (2 points) -3 -2 -1 0 1 2 3 z score 9. What z score divides a normal distribution into equal proportions for the body and the tail? (1 point)

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