As a National Institutes of Health administrator, you wish to evaluate an experiment at the University of Illinois concerning the impact of exercise on individuals with high-cholesterol diets. The Illinois researchers take 25 pigs that have high-cholesterol diets; 10 of these are randomly selected and made to jog on a treadmill for 2 miles a day. The other 15 pigs do not jog (although they might play golf or get exercise in other ways). After 6 months, each pig is tested for cholesterol in the bloodstream (measured in parts per million) with the following results:
Present a hypothesis and a null hypothesis, and evaluate them. Present a statistical conclusion in plain English.

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