1. Assume that adults have IQ scores that are normally distributed with a mean of 99.6 and a standard deviation of 18.9. Find the probability that a randomly selected adult has an IQ greater than 127.3. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 127.3 is ?
Added by Daniela S.
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3 using the formula z = (X - μ) / σ, where X is the IQ score, μ is the mean, and σ is the standard deviation. z = (127.3 - 99.6) / 18.9 z = 27.7 / 18.9 z ≈ 1.46561 Show more…
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