Quiz

USA Today reported this morning about dieters:

"...those who drink a couple of more cups of water a day increase weight loss by 2 pounds a year, a study presented Tuesday at the annual meeting of the Obesity Society suggests. ... researchers analyzed weight-loss data on 240 overweight women, ages 25 to 50, who were following one of several popular diet plans, including Atkins and The Zone, programs that restrict carbohydrate consumption to varying degrees."

Suppose the standard deviation for these women was 10 pounds.  Determine a 99% confidence interval and use a complete sentence to interpret this interval in the context of the study.  Round your answer to three decimal places.