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(Solution document) The key variable of interest for Goble and his colleagues was athletes' balance.


The key variable of interest for Goble and his colleagues was athletes' balance. Goble stated, "It seems like the healthy, college-aged kid will score a 20 - and that number represents the number of centimeters of sway over the course of a single 20 second trial."

Hence, balance was measured as the number of centimeters of sway over the course of a 20-second trial. What concept in research methodology does the number of centimeters best represent?

The internal validity of the balance variable.

A hypothesis about athletes' balance.

An inferential statistic summarizing the data.

The operational definition of balance.

 







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