Essay
Suppose you want to determine whether taking vitamins every day helps people lose weight.You survey 200 people who had been on a weight loss program for six months, and ask them whether or not they take vitamins every day, and how much weight they lost.Suppose you found that the people who lost the most weight were more likely to have taken vitamins every day.Does this mean vitamins caused the additional weight loss? Explain why or why not.
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No; this was an observational study, not...View Answer
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