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A city magazine seeks to report on the mean cost of dinner for two people at restaurants in the city. The magazine staff will collect
A city magazine seeks to report on the mean cost of dinner for two people at restaurants in the city. The magazine staff will collect data from a random sample of restaurants in the city and estimate the mean price using a 90% confidence interval. Assuming that the population standard deviation is $35, which of the following is the minimum sample size needed to obtain a margin of error of no more than $5?
133
112
147
90
195
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