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Author Question: Find the z-scores that bound the middle 75 of the standard normal ... (Read 70 times)

vinney12

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on: Jul 24, 2018
Find the z-scores that bound the middle 75 of the standard normal distribution.

Question 2

Events A and B are mutually exclusive events defined on a common sample space. If P(A) = 0.4 and P(A or B) = 0.9, find P(B).


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kaylee05

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Reply #1 on: Jul 24, 2018
Answer to Question 1

z = -1.15 and +1.15

Answer to Question 2

0.5


vinney12

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Reply #2 on: Jul 24, 2018
Thank you!


kaylee05

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Reply #3 on: Jul 24, 2018
Always glad to help...


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