An Internal Revenue Oversight Board survey found that 82% of taxpayers said that it was very important for the Internal Revenue Service to ensure that high-income tax payers do not cheat on their tax returns.
1. For a sample of 8 taxpayers, what is the probability that at least 6 believe that it is important to ensure that high-income tax payers do not cheat on their returns? Use the binomial distribution probability
2. For a sample of 80 taxpayers, what is the probability that at least 60 taxpayers say that is important to ensure that high-income tax payers do not cheat on their returns? Use the normal approximation of the binomial distribution