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Social Studies, 23.10.2019 02:50 raveransaw

Aresearcher wants to study the effect of regular exercise on cholesterol level. the researcher compares the cholesterol levels of 50 people who belong to a local gym and exercise there regularly with the cholesterol levels of 50 people from the same community who do not exercise regularly. the cholesterol levels of the gym members are substantially lower. the researcher can conclude that:

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Aresearcher wants to study the effect of regular exercise on cholesterol level. the researcher compa...
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