[Answered] Find the z-scores that bound the middle 75 of the standard normal ...

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vinney12

Hero Member
Posts: 586

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

Sr. Member
Posts: 318

Reply #1 on: Jul 24, 2018

Answer to Question 1

z = -1.15 and +1.15

Answer to Question 2

0.5

vinney12

Hero Member
Posts: 586

Reply #2 on: Jul 24, 2018

Thank you!

kaylee05

Sr. Member
Posts: 318

Reply #3 on: Jul 24, 2018

Always glad to help...

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