Question: QuestionNull Hypothesis Are teens better at math than adults? Age has no effect on mathematical ability. Does taking aspirin every day reduce the chance of

QuestionNull HypothesisAre teens better at math than adults? Age has no effect on mathematical ability.

Does taking aspirin every day reduce the chance of having a heart attack?Taking aspirin daily does not affect heart attack risk.

Do teens use cell phones to access the internet more than adults?Age has no effect on how cell phones are used for internet access.

Do cats care about the color of their food?Cats express no food preference based on color.

Does chewing willow bark relieve pain?There is no difference in pain relief after chewing willow bark versus taking a placebo.

From the examples given above, which is dependent and which is independent variables?

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