From a mathematics class of 12 equally capable students
Chapter 16, Problem 16.19(choose chapter or problem)
From a mathematics class of 12 equally capable students using programmed materials, 5 students areselected at random and given additional instruction by the teacher. The results on the nal examination are as follows: Grade Additional Instruction 87 69 78 91 80 No Additional Instruction 75 88 64 82 93 79 67 Use the rank-sum test with =0 .05 to determine if the additional instruction aects the average grade.
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