Solution-Sample size have to be to cut the margin

Sample size have to be to cut the margin

Reference no: EM131660358

A survey was conducted of the age? (in years) of 30 randomly selected customers. The mean was 32.78 years and the standard deviation was 11.17 years.

?a) How large would the sample size have to be to cut the margin of error in? half?

?b) About how large would the sample size have to be to cut the margin of error by a factor of 5??

Reference no: EM131660358

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Sample size have to be to cut the margin

Reference no: EM131660358

Reference no: EM131660358

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