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Mathematics, 12.02.2021 07:50 Jasten

In a study of the relationship for senior citizens between physical activity and frequency of colds, participants were asked to monitor their weekly time spent in exercise over a five-year period and the frequency of colds. the study demonstrated that a negative statistical relation exists between time spent in exercise and frequency of colds. The investigator concluded that increasing time spent in exercise is an efficient strategy for reducing the frequency of colds for senior citizens. Were the data collected in the study observational or experimental data

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