A) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability that a randomly selected adult has an IQ between 90 and 120. (Provide graphing calculator sequence)
B) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard of 15. Find P3D, which is the IQ score separating the bottom 30% from the top 70%. (Provide graphing calculator sequence)
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