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To test whether students in a higher grade level will be less disruptive in class, a...

To test whether students in a higher grade level will be less disruptive in class, a school psychologist records the number of documented interruptions during one day of classes from nine local high schools. The sample consisted of nine (n = 9) freshman, sophomore, junior, and senior high school classes. The data for each high school class are given in the table. High School Class Freshman Sophomore Junior Senior 0 2 5 3 4 0 3 2 1 4 5 4 5 4 0 4 2 1 0 4 2 0 4 3 3 1 0 2 4 3 3 5 2 5 4 2 (a) Complete the F-table. (Round your answers to two decimal places.) Source of Variation SS df MS F Between groups Within groups (error) Total

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