A company announced a 1000 Chips Trial,\" claiming that every 18-ounce bag of it

Question

A company announced a 1000 Chips Trial," claiming that every 18-ounce bag of its cookies contained at least 1000 chocolate chips. Students purchased random bags of cookies from different stores and counted the number of chips in each bag. Some of the data is shown below Complete parts a) through c) 1075 1254 1160 1200 1129 1312 1208 1362 1247 1496 9D0 1600 Chips Histogranm a) Check the assumptions and conditions for inference Is the independence assumption met? No Yes Is the randomization condition met or is the sample suitably representative? 0 Yes Is the 10% condition met? y Yes No Is the nearly normal condition met? 0 Yes b) Create a 95% confidence interval for the average number of chips

Explanation / Answer

The statistical software output for this problem is:

One sample T confidence interval:
: Mean of variable

95% confidence interval results:

Hence,

95% confidence interval for the average number of chips will be:

1156.9 < < 1331.7

Variable Sample Mean Std. Err. DF L. Limit U. Limit Data 1244.3 38.619814 9 1156.9359 1331.6641

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