SOLUTION: assume the random variable x is normally distributed with mean =86 and standard deviation =4, Find the indicated probability p(x<83)=?

SOLUTION: assume the random variable x is normally distributed with mean =86 and standard deviation =4, Find the indicated probability p(x<83)=?

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Question 982999: assume the random variable x is normally distributed with mean =86 and standard deviation =4, Find the indicated probability p(x<83)=?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
z = (x-mu)/sigma

z = (83-86)/4

z = -0.75

Use a table like this one to find that P(Z < -0.75) = 0.22663

So, P(X < 83) = 0.22663

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