Suppose that IQ is normally distributed with mean 90 and standard deviation 10. Find the following. What is the probability that a randomly selected individual has an IQ greater than 115? a. 0.933 What is the probability that a randomly selected individual has an IQ between 90 and 110? b. 0.477 What is the probability that a randomly selected individual has an IQ less than 105? c. 90 What IQ is the 50th percentile for this population? d. 94.4 What IQ is the 67th percentile for this population? e. 0.006
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5 \] Next, we find the probability that Z is greater than 2.5, which is approximately 0.0062. Show more…
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IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. a. What is the probability that a randomly selected person has an IQ more than 90? b. What is the probability that a randomly selected person has an IQ less than 128? c. What IQ score represents the 33rd percentile?
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