l. A high school English Teacher measured the attitudes of 11thgrade students toward poetry. After a lElwareel: unit on poetry, she measured the students' altitudes again. She was disappointed to nd that. The mean change was zero. Following are some representative scores. [High scores indicate favorable attitudes.) Calculate E for before scores and after was, and write a conclusion based on The standard deviations. Before75355456 After 95113912 Before After N Valid 8 8 Missing 6 6 Frequency Table Before Cumulative Frequency Percent Valid Percent Percent Valid 3.00 7.1 12.5 12.5 4.00 7.1 12.5 25.0 5.00 28.6 50.0 75.0 6.00 7.1 12.5 37.5 7.00 7.1 12.5 100.0 Total 8 57.1 100.0 Missing System 6 42.9 Total 14 100.0 After Cumulative Frequency Percent Valid Percent Percent Valid 1.00 2 14.3 25.0 25.0 2.00 2 14.3 25.0 50.0 8.00 2 14.3 25.0 75.0 9.00 2 14.3 25.0 100.0 Total 8 57.1 100.0 Missing System 6 42.9 Total 14 100.0 Descriptives Descriptive Statistics N Minimum Maximum Mean Std. Deviation Before 8 3.00 7.00 5.0000 1.19523 After 8 1.00 9.00 5.0000 3.77964 Valid N (listwise)