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EDPY 401 Standardized Testing fall 2011

EDPY 401 Standardized Testing fall 2011 - EDPY 401 Agenda...

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11/26/2011 1 EDPY 401 Agenda Nov. 28 More on Classroom Assessment Standardized Tests Next Class: Lesson Plan Analysis and Assessment Plan Analysis due >1500 words Apply SPECIFIC CONCEPTS Informal Assessments Assessing Student Learning Types of Assessment Informal Formal Formative Summative Basic Concepts of Measurement Central tendency Score that is typical or representative of the entire group Mean Simple average Median Middle score in a series of scores Mode Most frequently-occurring score Variability How widely the scores are distributed with a group Basic Concepts of Measurement: Standard Deviation (SD) Degree of variability in a group of scores Equals the square root of each score’s deviation from the mean Small standard deviation Most scores are close to the mean. Large standard deviation Scores are more spread out.
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11/26/2011 2 Normal Distribution Normal distribution Symmetrical and bell- shaped frequency distribution Mean, median, and mode are equal and appear at the mid-point of the distribution. 68% of scores fall within one SD of the mean. Two SDs above and below the mean include approximately 95% of all scores. Three SDs above and below the mean include approximately 99% of all scores. Frequency Distributions Frequency distribution Simple list of all scores for a group Skewness The symmetry or asymmetry of a frequency distribution Negatively-skewed distribution Scores pile up toward the high end. Positively-skewed distribution Scores are piled up at the lower end. A positively skewed distribution is asymmetrical and points in the positive direction. If a test was very difficult and almost everyone in the class did very poorly
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