The IQ scores of a large group of students are approximately normally distributed with a mean of 100 and a standard deviation of 15. 8. When a random chosen student from this group will have an 1Q score whose corresponding Z-score is negative; what is expected with IQ score of the chosen student? A. It is higher than the mean of 100. B. It is lower than the mean of 100. C. It is equal to the mean of 100. D. It is not equal to the mean of 100.

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