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7. (4 points) The distribution of IQ scores for high school graduates is normally distributed with mean p = 120 and standard deviation 0' =

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7. (4 points) The distribution of IQ scores for high school graduates is normally distributed with mean p = 120 and standard deviation 0' = 10. a. Find the probability a person chosen at random from this group has an IQ score above 140 b. What fraction of the IQ scores would be between 95 and 115? What is the 90tll percentile of this normal distribution? a? If 25 graduates are selected randomly, what is the probability that they will have an average IQ score of 114 or higher

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