Scientists want to test a new pair of running shoes A speed test is performed...

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Scientists want to test a new pair of running shoes A speed test is performed with two separate groups of participants The treatment group will wear the new pair of running shoes while the control group will not It is believed that age and height may affect speed Which of the following would be most effective in controlling the confounding variables such as age and height in this study O A matched pair design experiment O A completely randomized design experiment O A retrospective observational study OA longitudinal observational study

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Scientists want to test a new pair of running shoes A speed test is performed with two separate groups of participants The treatment group will wear the new pair of running shoes while the control group will not It is believed that age and height may affect speed Which of the following would be most effective in controlling the confounding variables such as age and height in this study O A matched pair design experiment O A completely randomized design experiment O A retrospective observational study OA longitudinal observational study