Contributions, please, part II In Chapter 18, Exercise 15,you learned that the Paralyzed Veterans of America is aphilanthropic organization that relies on contributions.They send free mailing labels and greeting cards topotential donors on their list and ask for a voluntarycontribution. To test a new campaign, the organization recently sent letters to a random sample of 100,000 po-tential donors and received 4781 donations. They’ve had a contribution rate of 5% in past campaigns, but a staffmember worries that the rate will be lower if they run thiscampaign as currently designed.a) What are the hypotheses?b) Are the assumptions and conditions forinference met?c) Do you think the rate would drop? Explain.

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Q: measurement

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.