2. A random sample of 250 teachers were classified according to highest educational degree and number of years in teaching service:Test the hypothesis, at the 0.05 level of significance, that the number of years in teaching service is independent of the level of highest educational degree by the teacher. Number of years in teaching Educ. Degree 1- 11 - Over 10 20 Doctoral 6 24 34 Masteral 23 36 44 Bachelor 35 24 24

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