According to the U.S. government, 68% of American adults weigh more than they should. A dietician, Dr. Christiansen, maintained a theory that drinking 8 or more glasses of water a day was associated with not being overweight. She obtained a random sample of 580 American adults who consumed 8 or more glasses of water a day, weighed each adult, and classified each one as overweight or not. The table below shows the observed frequencies and the expected frequencies. The chi-square goodness-of-fit test results were χ²(1, N = 580) = 15.62, p < .05. Write a fourpoint interpretation.

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Not Overweight Overweight 230 fobserved observed fespected Expected 350 185.60 394.40