Student teachers are trained to develop lesson plans, on the assumption that the writ- ten plan will help them perform successfully in the classroom. In a study to assess the relationship between written lesson plans and their implementation in the class- room, 25 lesson plans were scored on a scale of 0 to 34 according to a Lesson Plan Assessment Checklist. The 25 scores are shown in Table 2.4. Use Tchebysheff's Theorem and the Empirical Rule (if applicable) to describe the distribution of these assessment scores.

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Lesson Plan Assessment Scores 26.1 26.0 14.5 29.3 19.7 22.1 21.2 25.6 31.9 25.0 15.9 20.8 20.2 17.8 13.3 25.6 26.5 15.7 22.1 29.0 21.3 23.5 22.1 10.2 13.8