A philanthropic organisation sent free mailing labels and greeting cards to a random sample of 100...

A philanthropic organisation sent free mailing labels and greeting cards to a random sample of 100 comma 000 potential donors on their mailing list and received 5404 donations.

(a) Give a 90% 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 5.2%. Given the confidence interval you found, do you find that rate plausible?

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orchestra answered 1 year ago

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