What fraction of people develop aids

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The average time between infection with the AIDS virus and developing AIDS has been estimated to be 8 years with a standard deviation of about 2 years. Approximately what fraction of people develop AIDS within 4 years of infection? Assume that the distribution of time between infection with the AIDS virus and developing AIDS is symmetrical, bell-shaped. Please choose the answer that is closest to your calculations.

Reference no: EM132377698

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