A sandwich chain advertises that it has foot long sandwiches Wanting to know if this...
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A sandwich chain advertises that it has foot long sandwiches Wanting to know if this advertisement is accurate you measured a random sample of forty sandwiches and found the mean length as 11 9 inches and the standard deviation is 0 4 inches Using the table below find the 95 confidence interval 11 78 to 12 02 11 80 to 12 00 11 74 to 12 06 E Confidence Level as a percent 90 95 99 valuez 1 645 1 960 2 576
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