You have a study partner who says that she has an IQ of 130. Given that the mean IQ is 100 and the standard deviation is 15, what would you conclude about your partner?

Question

Quizplus · Accepted Answer

A) IQ of 130 is considered to be quite high, so she could be considered pretty smart.
B) The mean IQ is 100, so with an IQ of 130, your study partner is definitely above average in intelligence.
C) To calculate her intelligence z score, you would use the formula z = (X - μ) / σ, where X is her IQ score, μ is the mean IQ, and σ is the standard deviation. Plugging in the numbers, you get z = (130 - 100) / 15 = 2.00. So her intelligence z score is indeed 2.00.
Therefore, D is the correct answer.

You Have a Study Partner Who Says That She Has