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To answer the following questions, researchers would measure two variables for each individual unit in the study. In each case, specify the two variables, and the variable type for each. Then, specify which is the explanatory variable and which is the response variable.

a. Is the average IQ of left-handed people higher than the average IQ of right-handed people?

b. For married couples, is there a relationship between owning a pet and whether or not they get divorced?

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