A researcher was interested in the role of caffeine in sports performance In cooperation with her University's baseball team, she randomly assigned players to one of two conditions (1) no caffeine or (2) low dose (100mg) She then used performance on a batting machine as a test She speculated that ...

The study is a causal study as the researcher is manipulating the independent variable caffeine to o ...

A researcher was interested in the role of caffeine in sports performance. In cooperation with her...

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Seeing Through Statistics

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