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What is the expected number of students

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1. Suppose 6 of 15 students in a grade-school class develop influenza, whereas 20% of grade-school students nationwide develop influenza.

a. Is there evidence of an excessive number of cases in the class? That is, what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds true?

b. What is the expected number of students in the class who will develop influenza?

Reference no: EM132855215

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