From Exercise 7: In a survey of 500 randomly selected high school teachers and 1000 randomly selected grade school teachers, 160 (32%) of the high school teachers and 260 (26%) of the grade school teachers cited lack of classroom discipline as a significant problem. Use an appropriate table format to test the hypothesis that the proportion of teachers who hold this opinion is the same for the two populations represented here. Use a significance level of 5%.
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