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Current Attempt in Progress How Much Fat Do US Adults Consume? 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 x = 77.03 grams withs = 33.83 grams. Click here for the dataset associated with this question. (a) Find a 95% confidence interval for the average number of fat grams consumed per day by US adults. Round your answers to two decimal places. The 95% confidence interval is i i eTextbook and Media Hint (b) What is the margin of error? Round your answer to two decimal places. margin of error = i eTextbook and Media Hint (c) If we want a margin of error of only + 0.5, what sample size is needed? Round your answer up to the nearest integer. sample size : i eTextbook and Media Hint