Jill comes to you and is interested in the mean calorie content
of energy bars. She...
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Jill comes to you and is interested in the mean calorie contentof energy bars. She believes that the distribution of caloriecontent is approximately normal. You tell her to take a sample ofenergy bars. Jill comes back to you and says that she took a randomsample of 12 energy bars, and found that, on average, there were240 calories per bar, with a standard deviation of 30 calories. Usea 97% confidence interval?
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Solution Given that 240s 30n 12Degrees of freedom df n 1 12 1
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