The Human Toxome Project (HTP) is working to understand the scope of industrial pollution in the human body. Industrial chemicals may enter the body through pollution or as ingredients in consumer products. In October 2008, the scientists at HTP tested cord blood samples for 20 newborn infants in the United States and found a mean of 127.45 of targeted chemicals with a standard deviation of 25.965. Find the 90% confidence interval for the mean number of all targeted industrial chemicals found in cord blood in the United States.
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