A sample of 350 orders for take-out food at a local pizzeria found that the average cost of an order was $22 with s=$14
a, What us the margin of error if we use a 95% confidence interval, for the average cost of an order?
b. Interpret for management the margin of error
c. If we need to be 99% confident, does the confidence interval become wider or narrower?
d. Find the 99% confidence interval
