How large would sample size have to be-cut margin of error
A survey was conducted of the age in years of 50 randomly selected customers. The mean was 27.47 years with a standard deviation of 10.69 years.
About how large would the sample size have to be to cut the margin of error by a factor of 4?
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The mean was 27.47 years with a standard deviation of 10.69 years. About how large would the sample size have to be to cut the margin of error by a factor of 4?
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