Question: Determine whether the following study described is observational or an experiment. If the study is an experiment, identify the control and treatment groups, and discuss

Determine whether the following study described is observational or an experiment. If the study is an experiment, identify the control and treatment groups, and discuss whether single- or double-blinding is necessary. If the study is observational, state whether it is a retrospective study, and if so, identify the cases and controls.

A study of 2501 runners looked for relationships between specific types of running injuries and variables such as height, weight, body mass index, age, and running history.

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