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1. IQ tests and scores are scaled to have a mean of 100 and a standard deviation of 15. They also are approximately normally distributed.
1. IQ tests and scores are scaled to have a mean of 100 and a standard deviation of 15. They also are approximately normally distributed. (a) A person scores 110 of the IQ test. What is the probability of a randomly selected person scoring higher than 110? (b) What IQ score puts a person in the 70th percentile? (c) What is the probability that a randomly selected person has an IQ between 120 and 130?
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