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Students investigating the packaging of potato chips purchased 6 bags of Lay s Ruffles marked with a net weight of 28.3 grams. They carefully weighed the contents of each bag, recording the following weights (in grams): 29.3, 28.2, 29.1, 28.7, 28.9, 28.5.
a) Do these data satisfy the assumptions for inference? Explain.
b) Find the mean and standard deviation of the observed weights.
c) Create a 95% confidence interval for the mean weight of such bags of chips.
d) Explain in context what your interval means.
e) Comment on the company s stated net weight of 28.3 grams.
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