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Ch. 6 # 5:

I have previously posted this question on Zookal.com, I cannot get a correct answer. The answers I received were wrong, except for c. Please help in answering this correctly.

Let X be normally distributed with mean μ = 136 and standard deviation σ = 34. [You may find it useful to reference the z table.]

a. Find P(X ≤ 100). (Round "z" value to 2 decimal places and final answer to 4 decimal places.)

P(X ≤ 100):_______________

b. Find P(95 ≤ X ≤ 110). (Round "z" value to 2 decimal places and final answer to 4 decimal places.)

P(95 ≤ X ≤ 110):_____________

c. Find x such that P(X ≤ x) = 0.450. (Round "z" value and final answer to 3 decimal places.)

P(X ≤ x) = 0.450:_____131.1440______

d. Find x such that P(X > x) = 0.850. (Round "z" value and final answer to 3 decimal places.)

P(X > x) = 0.850:________________

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