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From an English class of 20 students using programmed materials, 10 are selected at random and given additional instruction by the teacher. The results on the final examination were as follows: Grades in the Final Examination With Additional No Additional Instruction Instruction 87 75 91 78 85 81 80 85 86 72 85 80 81 81 85 85 83 80 79 70 Test at 0.01 level of signicance to nd out if the additional instruction affects the average grade assuming that the data is not normal. Use 2 decimal places STATISTICS = COMPUTED VALUE = TABULAR VALUE = CONCLUSION =