Exercise 1: Population Mean (One-Sample t-Interval)

In 1998, as an advertising campaign, the Nabisco Company announced a "1000 Chips Challenge," claiming that every 18-ounce (about 625 grams) bag of their Chips Ahoy cookies contained at least 1000 chocolate chips. Dedicated Statistics students at the Air Force Academy purchased some randomly selected bags of cookies and counted the chocolate chips. Some of their data are given below. The data are in the .RData file ChipsAhoy.

1219 1214 1087 1200 1419 1121 1325 1345

1244 1258 1356 1132 1191 1270 1295 1135

Histogram of a Sample of Chips Ahoy Cookies + Frequency O 1100 1200 1300 1400 Chocolate ChipsNormal Probability of Maze Times O Time O O -2 -1 0 2 Normal Scores\fNormal Probability Plot of Chocolate Chips Chocolate. Chips 1100 1150 1200 1250 1300 1350 1400 O O O O O O O O O -2 -1 0 Normal Scores 2