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A Find the standard z score such that 80 of the

a. Find the standard z-score such that 80% of the distribution is below (to the left of) this value.

b. Find the standard z-score such that the area to the right of this value is 0.15.

c. Find the two z-scores that bound the middle 50% of a normal distribution.

b. Find the standard z-score such that the area to the right of this value is 0.15.

c. Find the two z-scores that bound the middle 50% of a normal distribution.

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