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A pizza shop owner wishes to find the 95% Confidence Interval of the true mean cost of a large plain pizza. How large should the

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A pizza shop owner wishes to find the 95% Confidence Interval of the true mean cost of a large plain pizza. How large should the sample be if she wishes to be accurate to within $0.157 A previous study showed that the standard deviation of the price was 50.26. Which formula will you use for this problem? OF -2z () U

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