The Dunkin Donuts company makes the best corn muffins tops in the world but the other jealous companies wnat to find the perfect sample of how much corn muffin mix goes into their tops as they want to...

The Dunkin Donuts company makes the best corn muffins tops in the world but the other jealous companies wnat to find the perfect sample of how much corn muffin mix goes into their tops as they want to be 80% confident of their study.  As these companies use a margin of error of within .25 of the muffin tops and a standard deviation of 5 find the result of the corn muffin top study.