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a football coach hears that a new exercise program will increase upper-body strength better than lifting weights. he is eager to test this new program in the off-season with the players on his high school team. the coach decides to let his players choose which of the two treatments they will undergo for 3 weeks—exercise or weight lifting. he will use the number of push-ups a player can do at the end of the experiment as the response variable. which principle of experimental design does the coach’s plan violate? explain how this violation could lead to confounding
a football coach hears that a new exercise program will increase upper-body strength better than lifting weights. he is eager to test this new program in the off-season with the players on his high school team. the coach decides to let his players choose which of the two treatments they will undergo for 3 weeks—exercise or weight lifting. he will use the number of push-ups a player can do at the end of the experiment as the response variable. which principle of experimental design does the coach’s plan violate? explain how this violation could lead to confounding
Final answer:The coach's plan violates the principle of random assignment. This could introduce a confounding variable, as players may select a program based on their own preferences or perceived strengths, skewing the results. To avoid this, the coach should randomly assign players to either program.Explanation:The high school football coach's plan violates the principle ofrandom assignmentin experimental design. In this context, random assignment means every player should have an equal chance of being assigned to either the new exercise program or the weight lifting program. Instead, players are allowed to choose their treatment, which could lead to aconfounding variable.A confounding variable is an outside influence that changes the effect of a dependent and independent variable. This influence is often overlooked or believed to not exist, but skews the results of an experiment. In this case, players might choose the program they already think they can perform better in or the one they are more comfortable with, which would then affect the results of the experiment.To avoid this, the coach should assign players to either the exercise or weight lifting program randomly, thereby ensuring an even distribution of player capability, motivation, and comfort levels across both programs, which yields more accurate and reliable results.Learn more about Confounding Variable here:brainly.com/question/34189865#SPJ2...