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A vending machine distributor wants a 99% confident that the coffee machine is within a plusvor...

A vending machine distributor wants a 99% confident that the coffee machine is within a plusvor minus .15oz. . it is known that a standard deviation forb the population is.32 ounces, how many cups of coffee should be measured?

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Answer #1

Provided that a vending machine distributor wants a 99% confident that the coffee machine is within a plus or minus 0.15 oz.

The standard deviation for the population is 0.32 ounces.

We want to find the number of cups of coffee should be measured i.e the sample size(n)

The minimum sample size required is obtained by:

### By using standard normal distribution table

Therefore the number of coffee should be measured= 30

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