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Suppose you record data on these five variables for every student in your class: place of residence (dorm, apartment, with parents), GPA, gender, IQ score, and class year (freshman, sophomore, junior, senior).

a. Give an example of one pair of these variables for which it does not make sense to calculate a correlation coefficient. Explain

b. Give an example of one pair of these variables for which it does makes sense to calculate a correlation coefficient. Explain

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