Of the 155 billion mailpieces the U.S. Postal Service (USPS) processed and delivered in 2017, 4.3% were

Question:

Of the 155 billion mailpieces the U.S. Postal Service (USPS) processed and delivered in 2017, 4.3% were undeliverable as addressed. Suppose that a brief questionnaire about USPS service is attached to each mailpiece in a random sample of 114,250 mailpieces.

a. What is the sampling distribution of the sample proportion of undeliverable mailpieces p for this study?

b. What is the probability that the sample proportion of undeliverable mailpieces p will be within .1% of the population proportion of undeliverable mailpieces?

c. What is the probability that the sample proportion of undeliverable mailpieces p will be within .05% of the population proportion of undeliverable mailpieces? Comment on the difference between this probability and the probability computed in part (b).

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

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