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Philosophy 203:  Scientific Reasoning
Quiz: Mill's Methods

Answer For John's Method of Concomitant Variation

Sue, Bob, John, Carol, Tim, and Katie were discussing their literature grades after grades for the course were posted. They were unable to figure out the instructor’s assignment of grades. Sue, Carol, and Katie received A’s. Bob and John received a C, but Tim was assigned a D. John and Katie worked twenty hours a week at K-Mart, but none of the others had a job outside of school-work. Sue and Carol sat in the front row of the class; Katie sat in the second row; Bob, John and Tim sat toward the back of the class. In fact, Bob and John sat on the fourth row, and Tim sat on the last row of the class. Katie, John, and Bob typed their literature papers but the others did not.

John proposed the following chart. By the Method of Concomitant Variation, what is the probable cause of the assignment of grades?

 Instance Where sat in Class Grade Sue 1st row A Carol 1st row A Katie 2nd row A Bob 4th row C John 4th row C Tim Last row D

Conclusion:

John should conclude that probably where one sits in class  is the cause, the effect, or an indispensible part of the cause of getting an A in the class.

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