Identify the experimental and controlled variables

Reference no: EM133502849

Dr. Gerbil had a hunch that taco chips could be used to treat bronchitis. So, he found 20 students with bronchitis. Fourteen students ate two bags (35 g each) of taco chips each day. Six students ate two bags of salt and vinegar chips (35 g each) each day. He asked all of his subjects to refrain from smoking and alcohol, to eat the same diet (aside from the chips), and not to take any cold medications. After 1 week, 12 of the 14 students that ate taco chips were feeling well enough to run up two flights of stairs, but only three of the six students that ate salt and vinegar chips were feeling well enough to accomplish the same task. Dr. Gerbil concluded that his study was a success and recommended that all bronchitis sufferers start eating taco chips.

Identify the experimental and controlled variables.

Find 3 problems with the design of this experiment.

Reference no: EM133502849

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