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A philanthropic organisation sent free mailing labels and greeting cards to a random sample of 100,000 potential donors on their mailing list and received 5292
A philanthropic organisation sent free mailing labels and greeting cards to a random sample of 100,000 potential donors on their mailing list and received 5292 donations.
(a) Give a 99% confidence interval for the true proportion of those from their entire mailing list who may donate.
(b) A staff member thinks that the true rate is 5.7%. Given the confidence interval youfound, do you find that rateplausible?
(a) What is the 99% confidenceinterval?
The 99% confidence interval is from ___% to ____
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