Question: 21. In a standardized normal distribution, what are the values of a mean and standard deviation? 2 22. IQ is normally distributed with a mean

21. In a standardized normal distribution, what are the values of a mean and standard deviation?2

22. IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual.

Find the probability that the person has an IQ less than 120.

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