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masha68 [24]
3 years ago
13

A certain organization wants to know the opinion of the adult residents, 35 years of age or older, of the xxx city with a total

population of 55,000 about lowering the drinking age to 18
Mathematics
1 answer:
DaniilM [7]3 years ago
5 0

0.7 +/- 0.0635 is the answer. The confidence interval is

p±1.96√p(1−p)/n

<span>p = 140/200 = 0.7 (the proportion in favor of lowering the drinking age) n = the sample size, 200 1.96 is the critical value for a 95% confidence interval, from the z-table (standard normal distribution)</span>

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6 0
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