Ten Experienced and Ten Novice Distance Runners (Running Status) Were

question 16

Multiple Choice

Ten experienced and ten novice distance runners (running status) were asked to run four marathons. During each run, a different carbohydrate solution (concentration) was consumed (flavoured water, placebo; 3% solution, low dose; 6% solution, medium dose; 9% solution, high dose) and race time was recorded. How many independent variables were measured?

• A) 2
• B) 3
• C) 4
• D) 5

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