Test scores on a university admissions test are normally distributed, with a mean of 500 and...

Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100.

d. 20% of test scores exceed what value?

i know

P(X>= c-500/100) = .20

but after this, i dont understand why c -500/100 =.84

where did this .84 come from?

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Expert Solution

orchestra answered 1 year ago

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