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25. Stanford-Binet IQ scores have a mean of 100 and a standard deviation of 16. Dmitri has an estimated IQ of 79. Given this

25. Stanford-Binet IQ scores have a mean of 100 and a standard deviation of 16. Dmitri has an estimated IQ of 79. Given this information, answer the following: a. What is Dmitri's raw IQ score converted into a z-score? b. Is Dmitri's score "usual"? Why or why not?

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