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What is the sample of study

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Gwen is interested in the effect of bananas on the speed and endurance of high school cheerleaders. She recruits 20 cheerleaders from high schools in California. Each cheerleader was asked to run as many laps as they could in 20 minutes on a standard 100M track. Two weeks later the same cheerleaders were asked to run as many laps as they could in 20 minutes, but were asked to eat a banana 10 minutes prior to starting. The number of laps completed (to the nearest quarter lap) was recorded. What is the sample of this study?

Reference no: EM132483336

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