Question: I hate statistics! Please help :) A sample of400orders fortake-out food at a local pizzeria found that the average cost of an order was $25with

I hate statistics! Please help :)

A sample of400orders fortake-out food at a local pizzeria found that the average cost of an order was $25with s=$18.

(a) Find the margin oferror, if we use a 95% confidenceinterval, for the average cost of an order.

(b) Interpret for management the margin of error.

(c) If weneed to be 99%confident, does the confidence interval become wider ornarrower?

(d) Find the 99%confidence interval.

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