a restaurant owner wishes to find the 99% confidence interval of the true mean cost of a dry martiny. how large shouyld the sample be if she wishes to be accurate within $0.10? a previous study showed that the standard deviation of the price was $0.12.A restaurant owner wishes to find the 99% confidence interval of the true mean cost of a dry martiny. how larg
.10 = 2.575*.12/sqrt(n)
sqrt(n) = 2.575*.12/.10
sqrt(n) = 3.09
n = 3.09^2 = 9.5481
The sample size should be at least 10.
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