d) What heights form the middle 90% of the population? 3) The Wechsler Adult Intelligence Scale is normally distributed with a population mean of 100 and the standard deviation o 15. Given this information, find the following probabilities: a) What is the probability of randomly selecting a person from the population with an IQ above 120 or below 80? b) What is the probability of randomly selecting two people with from the population with IQ's