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Students taking a standardized IQ test had a mean score of 100 with a standard deviation...

Students taking a standardized IQ test had a mean score of 100 with a standard deviation of 15. What is the lowest score that would still place a student in the top 15%?

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Answer #1

Hello

YOUR REQUIRED ANSWER IS 115.55

Given that:

Mean = 100

S.D. = 15

To be in top 15%, p-value = 0.85 which corresponds to z = 1.0364

Hence,

X = (1.0364*15) + 100 = 115.55

Thanks!

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