Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
QUESTION
A survey was conducted of the age (in years) of 30 randomly selected customers. The mean was 32.66 years and the standard deviation was 11.81 years.
A survey was conducted of the age (in years) of 30 randomly selected customers. The mean was 32.66 years and the standard deviation was 11.81 years.
a) How large would the sample size have to be to cut the margin of error inhalf?
b) About how large would the sample size have to be to cut the margin of error by a factor of 55?
