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I am having trouble with Real Applications of Normal Distributions 8: Some IQ tests are standardized to a Normal model with a mean of 100

I am having trouble with Real Applications of Normal Distributions

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8: Some IQ tests are standardized to a Normal model with a mean of 100 and a standard deviation of 16. Math 150, Spring 2021 El Camino College G. Song a: What proportion of test takers score a 130 or higher? b: What score would begin the interval for the top 16% of all scores? c: The top 10% of all scores represent the label of "genius". What is the range of scores for anyone who qualifies as a genius? 9: Assume the cholesterol levels of adult American women can be described by a normal distribution with a mean of 188 mg/dL and a standard deviation of 24 mg/dL. a: What percent of adult women do you expect to have cholesterol levels over 200 mg/dL? b: What percent of adult women do you expect to have cholesterol levels between 150 and 170 mg/dL? c: Above what value are the highest 15% of women's cholesterol levels

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