Worksheet: Confidence Intervals for Proportions1. The paralyzed Veterans of America is a philanthropic organization that relies oncontributions. They send free mailing labels and greeting cards to potential donors ontheir list and ask for voluntary contribution. To test a new campaign they recently sentletters to a random sample of 100,000 potential donors and received 4781 donations.a) Give a 95% confidence interval for the true proportion of those from theirentire mailing list whomaydonate.b) A staff member thinks that the true rate is 5%. Given the confidence intervalyou found, do you find that percentage plausible?

Given : n=100000 x=4781 c=95%=0.95

Answered: et: Confidence Intervals for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a survey of 3213 adults aged 57 through 85 years, it was found that 83.9% of them used at least one prescription medication. Complete parts (a) through (c) below. a. how many of the 3213 subjects used at least one prescription medication? b. construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. c. what do the results tell us about the proportion of college students who use at least one prescription medication?
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