<PRE><B>Question 435528</B>
A vending machine distributor wants to be 98% confident that the coffee machine is dispensing the correct amount of coffee to within 0.15 fluid ounces. If it is known that the standard deviation is 0.32 fluid ounces, how many cups of coffee should be measured?
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n = [z*s/E]^2
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n = [2.3263*0.32/0.15]^2
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n = 25 when rounded up
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Cheers,
Stan H.</PRE>