Livestock are given a special feed supplement to see if it will promote weight gain. The researchers report that the 77 cows studied gained an average weight of 56 pounds, and that a 95% confidence interval for the mean weight gain this supplement produces has a margin of error of +/- 11 pounds. After reading the report, several people tried to interpret the results of the study. Their statements are given below. For each statement, decide whether it is an accurate interpretation or an incorrect interpretation.