In: Statistics and Probability
Two different teaching procedures were used on two different groups of students. Each group contained 100 students of about the same ability. At the end of the term, an evaluating team assigned a letter grade to each student. The results were tabulated as follows:
Grade Group
A B C D F Total
Total (I) 15 22 32 17 14 100
(II) 9 16 29 28 18 100
If we consider this data to be comprised of independent observations, test at the 5 percent significance level the hypothesis that the two teaching procedures are equally effective.
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