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3. Suppose the score on an IQ test follows a normal distribution with mean 100 and standard deviation 15. Let X be the IQ score

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3. Suppose the score on an IQ test follows a normal distribution with mean 100 and standard deviation 15. Let X be the IQ score of a randomly selected person. F'FF'P'F' What is the probability that a randomly selected person has an IQ of 101'? What is the probability that a randomly selected person has an it) between 115 and 13ft? Would it be unusual for a person to have an IQ less than 60? Explain. What IQ score represents the 20th percentile of all IQ scores? Suppose that on another planet the IQ of a creature (may not be human) Y follows the normal distribution. The probability that Y exceeds 80 is 0.975, and the probability that Yexceeds 120 is 0.95. Find a and a. Are these values comparable with the expected IQ of a human? Explain

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