What is the difference between SE and SEM on the ASG reports?

Document created by Community User on Jul 28, 2017
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Question
What is the difference between SE and SEM in reports like the Achievement Status and Growth (ASG) report?

Answer
Both SEM and SE refer to the idea that there is always some amount of uncertainty when attempting to measure something like student achievement. SEM is used when referring to individual RIT scores, while SE is used for averages, gains, and other calculations made with RIT scores.

SEM stands for standard error of measurement, and refers to the error inherent in estimating a student's true test scores from his or her observed test scores. A MAP Growth test measures student achievement, and a RIT score is that measurement.

SE stands for standard error, and refers to the error inherent in estimating a parameter of a population from a sample statistic or a group of sample statistics. Since a student's growth, for example, is calculated from the RIT of the end term minus the RIT of the start term, we use SE.

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000002790

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