SOLUTION: Livestock are given a special feed supplement to see if it will promote weight gain. Researchers report that the 77 cows studied gained and average of 56 pounds, and the 95% confid
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Question 371546: Livestock are given a special feed supplement to see if it will promote weight gain. Researchers report that the 77 cows studied gained and average of 56 pounds, and the 95% confidence interval for the mean weight gain this supplement produces has a margin of error of 11 pounds. Which one of the following interpretations is correct?
A. We are 95% confident that the mean weight gain among all the cows fed by the special feed supplement will be between 45 and 67 pounds.
B. We are 95% confident that a cow fed this supplement will gain between 45 and 67 pounds.
C. We are 95% confident that the mean weight gain among the 77 cows fed by the special feed supplement will be between 45 and 67 pounds.
D. If the supplement is tested on another sample of cows, there is a 95% chance that their average weight gain will be between 45 and 67 pounds.
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