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How many samples do you need to select

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Your manager wants to know how many random samples should be selected to determine the percentage of people in New England who traveled more than 200 miles from home at least once during the past year. Furthermore, you need enough samples to be 90 percent certain that the true percentage will lie within 6 percent of your samples finding. You have no idea what the true proportion might be.

How many samples do you need to select?

You intend to measure the mean age of customers in a certain population. You want to measure this mean age within 3 years with 95 percent confidence. You have evidence that the variance of agers in this population is 400.

How many samples will have to be selected?

Reference no: EM132167027

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