Table 12.26 shows the relation between the performances of students in mathematics and physics. Test the hypothesis that performance in physics is independent of performance in mathematics, using the (a) 0.05 and
(b) 0.01 significance levels.
Mathematics
High Grades
Medium Grades
Low Grades
Physics
High grades
56
71
12
Medium grades
47
163
38
Low grades
14
42
85
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