A potato chip company labeled the bags containing 8 ounces of potato chips.

To check if the label is stated correctly, a simple random sample of 32 bags was collected,and it had a mean weight of8.12 ounces with a sample standard deviation, s = 0.2 ounce. One wants to construct a95% confidence interval of the population mean weight.

1. Which distribution should be used for the confidence interval? Normal distribution or t-distribution

2. What is the value of the margin of error, E (rounded to 5decimal places) ?

(Don't compute the confidence interval.)