Identify the independent and dependent variable:
question 1: a study was conducted to determine whether when arestaurant server drew a happy face on the check, that wouldincrease the amount of tip.
question 2: a study was conducted to determine if the maritalstatus of an individual had any effect on the cause of death of theindividual.
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question 3: suggest some cofounding variables that theresearcher might want to consider when doing a study
question 4: psychology today magazine reports that the moreintelligent a person is (based on IQ,) the more willing the personis to make a cooperative choice rather than a selfish one.
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