I used Kellog's stock data for the past 5 years.

Please give guidance as to how to use the attached data to input in the Sample Size Estimator file.  I used Kellog's stock data for the past 5 years.

I am being asked what size sample would you need to bracket the adjusted daily closing price within 50 cents (for example, a margin of error of 50 cents)? Use the standard deviation from your data for your calculations, and assume this standard deviation represents the population standard deviation.  I am not sure how to arrive at the answer.

I have attached the sample size estimator and the Kellog's stock data for the past 5 years.

I am not sure how to change the price of the tutor credits but if given some direction would be happy to pay for the help.

I have $24.00 additional tutor credits plus the $8.00 deposit already submitted.

Thanks!