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?
