15. Contributions, please. The Paralyzed Veterans
Chapter 19, Problem 15(choose chapter or problem)
15. Contributions, please. The Paralyzed Veterans ofAmerica is a philanthropic organization that relies oncontributions. They send free mailing labels and greetingcards to potential donors on their list and ask for a voluntarycontribution. To test a new campaign, they recentlysent letters to a random sample of 100,000 potentialdonors and received 4781 donations.a) Give a 95% confidence interval for the true proportionof their entire mailing list who may donate.b) A staff member thinks that the true rate is 5%. Giventhe confidence interval you found, do you find thatpercentage plausible?
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