I.Q.s in the population are normally distributed with a mean = 100 and a standard deviation...

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I.Q.s in the population are normally distributed with a mean = 100 and a standard deviation...

I.Q.s in the population are normally distributed with a mean = 100 and a standard deviation =15. Find the Z-score (two decimal places) for an I.Q. of 130

math Statistics-And-Probability

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Answer 1

Answer #1

Solution :

Given ,

mean = = 100

standard deviation = = 15

x=130

using z-score formula

z =X -/

z=130-100/15

z=2

z-score=2

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Answer 2

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