Remember that a confounding variable affects the response variable and is related to the explanatory variable. For each of the following situations, explain how the given confounding variable meets these criteria.
a. Response variable = Math skills of children aged 6 to 12 years old; explanatory variable = shoe size; confounding variable = age.
b. Response variable = Whether or not a student gets a cold during a school term; explanatory variable = whether or not the student procrastinates in doing assignments; confounding variable = number of hours per week the student spends socializing.