Using the dataset NutritionStudy, we calculate that the average number of grams of fat consumed in a
Question:
Using the dataset NutritionStudy, we calculate that the average number of grams of fat consumed in a day for the sample of n = 315 US adults in the study is x̅ = 77.03 grams with s = 33.83 grams.
(a) Find and interpret a 95% confidence interval for the average number of fat grams consumed per day by US adults.
(b) What is the margin of error?
(c) If we want a margin of error of only ±1, what sample size is needed?
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a For a confidence interval for using the tdistribution we use Using a tdistribution wit...View the full answer
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Related Book For 
Statistics Unlocking The Power Of Data
ISBN: 9780470601877
1st Edition
Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock
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