Research done at Harvard showed that regular soda drinkers may have a tendency toward the weak and brittle bones associated with osteoporosis. The researchers surveyed 2622 women who were active athletes in college and classified them as to whether or not they regularly drank soda. The proportion of women in each group who suffered from bone fractures was determined. It was found that those who drank soda regularly were twice as likely to suffer from bone fractures than those who did not drink regularly.

Let's Do It! 3.2 - Food Myths

Is this an observational study or an experiment?

What is the population under study?

What was the explanatory variable?

What was the response variable?

Suppose the 2622 women were selected as follows: From a list of all women sports events available at Harvard, three events were selected at random. The all women athletes who participated in these three events were contacted for the study. What type of sampling technique is illustrated here?

Let's Do It! 3.2 - Food Myths

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