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Statistical Analysis of Multiple Choice Exams

chemed.chem.purdue.edu · 3,093 words · saved by 1 readers

Introduction Rough Estimates of Test Reliability Analysis of the Mid-Point Item Analysis Distribution of Scores Coeffiecients of Reliability Calculation of Scaled Scores Cum Grano Salis Advantages of Scaled Scores Conclusions Disraeli once said that there are three types of lies. In order of increasing severity, they are: "lies, damned lies, and statistics." This quotation has an inordinate attraction for many, regardless of its validity. There is nothing inherently wrong with statistics, however, if they are used by individuals who understand them. The use of a multiple-choice format for hour exams at many institutions leads to a deluge of statistical data, which are often neglected or completely ignored. This section will introduce some of the terms encountered in the analysis of test results, so that these data may become more meaningful and therefore more useful.(1) Analysis of the Mid-Point We might begin with definitions of measures of the mid-point of a normal, Gaussian, or bell

Statistical Analysis of Multiple Choice Exams STATISTICAL ANALYSIS OF MULTIPLE CHOICE EXAMS Introduction Rough Estimates of Test Reliability Analysis of the Mid-Point Item Analysis Distribution of Scores Coeffiecients of Reliability Calculation of Scaled Scores Cum Grano Salis Advantages of Scaled Scores Conclusions Disraeli once said that there are three types of lies. In order of increasing severity, they are: "lies, damned lies, and statistics." This quotation has an inordinate attraction for many, regardless of its validity. There is nothing inherently wrong with statistics, however, if th

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