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Author Question: Find the z-score associated with the 80th percentile of the standard normal distribution. What does ... (Read 38 times)

Pineappleeh

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on: Jul 24, 2018
Find the z-score associated with the 80th percentile of the standard normal distribution. What does this value tell you?

Question 2

Explain why P(B occurring when A has already occurred) = 0 when events A and B are mutually exclusive.


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tanna.moeller

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

z = 0.84 . This says that the 80th percentile in a normal distribution is 0.84 standard deviations above the mean.

Answer to Question 2

Since A and B are mutually exclusive events, the occurrence of either event excludes the occurrence of the other. Now, since A has already occurred, then B cannot possibly occur.


Pineappleeh

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Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

essyface1

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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