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Estimate the difference in the mean calories

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A dieter believes that the average number of calories in a homemade peanut butter cookie is more than in a store bought cookie. Estimate the difference in the mean calories between the two types of cookies using a 90% CI.

n1=40 x1_bar=180 s1=2

n1=45 x1_bar=179 s1=4

What is the lower confidence bound, upper? two decimals

Reference no: EM131493827

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