help me with this stat problem

Anonymous
timer Asked: Feb 23rd, 2016

Question description

The Paralyzed Veterans of America is a philanthropic organization that relies on contributions. They send free mailing labels and greeting cards to potential donors on their list and ask for a voluntary contribution. To test a new campaign, they recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. a) Give a 95% confidence interval for the true proportion of their entire mailing list who may donate.

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