A Random Sample of Clients at a Weight Loss Centre

A random sample of clients at a weight loss centre were given a dietary supplement to see if it would promote weight loss.The centre reported that the 100 clients lost an average of 47 pounds,and that a 95% confidence interval for the mean weight loss this supplement produced has a margin of error of ±9 pounds.

A) 95% of the people who use this supplement will lose between 38 and 56 pounds.
B) The average weight loss of clients who take this supplement will be between 38 and 56 pounds.
C) 95% of the clients in the study lost between 38 and 56 pounds.
D) We are 95% sure that the average weight loss among the clients in this study was between 38 and 56 pounds.
E) We are 95% confident that the mean weight loss produced by the supplement in weight loss centre clients is between 38 and 56 pounds.

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