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A random sample of 70 printers discovered that a20 of them were being used in small businesses. Find the 99% limit for the population porportion of printers that are used in small businesses.
possible answers:
0.021 < p < 0.551
0.146 < p < 0.425
0.160 < p < 0.412
0.239 < p < 0.332
Department store accepts three types of credit cards, MasterCard, Visa, and their own store card. Charges are normally distributed. A random sample of 18 credit card purchases included 6 MasterCard
What is the 95 percent interval for the population mean?
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