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7. Two different AP Biology instructors compute the means and standard errors for the first exam score for their classes. The means and the SE

7. Two different AP Biology instructors compute the means and standard errors for the first exam score for their classes. The means and the SE bars are shown in the graphs below. For each of the teacher's sets determine whether the difference between the means of the two classes is (a) definitely significantly different, (b) not significantly different, or (c) unknown based on the graph. Justify your answer.

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