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Up to 20% of Americans contract influenza each year. A sample of 400 randomly selected Americans...

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Statistics

Up to 20% of Americans contract influenza each year. A sample of400 randomly selected Americans is chosen and the number withinfluenza is recorded. Let X represent the number with influenza inthe sample. What is the probability that, at most, 25% of thesample is observed to have influenza? How can I do this the easiestway on Ti-84? Can I use a button like Stats or Distr to make lifeeasy?

Answer & Explanation Solved by verified expert
4.1 Ratings (533 Votes)
The probability can be calculated by using Z statisticsFormulaHereP0 02 20 is the    See Answer
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