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PDF pending restorationMcMorris, Robert F. – 1971
The extent of error likely to occur with each of several approximations for the standard deviation, internal consistency reliability, and the standard error of measurement is analyzed. Approximations were compared with exact statistics obtained on 85 different classroom tests constructed and administered by professors in a variety of fields. Means…
Descriptors: Data Analysis, Error of Measurement, Evaluation Methods, Item Analysis
Download full textPorter, Andrew C. – 1978
A teaching aid appropriate for a beginning course on experimental design is presented. The aid is a numerical example which illustrates some of the theoretical interrelations among three competing design analysis strategies for estimating treatment effects in random assignment designs. The analysis strategies considered are analysis of variance…
Descriptors: Analysis of Covariance, Analysis of Variance, Error Analysis (Language), Error of Measurement
Gardner, Eric F. – NCME Measurement in Education, 1978
It is suggested that bias--when associated with a predictor, a test, or a statistical estimator--is not always bad, in spite of the immediate negative response evoked by the word, bias. Four settings are described to illustrate situations in which a procedure should not be summarily rejected due to bias: (1) educational researchers rejected the…
Descriptors: Achievement Tests, Bias, Competitive Selection, Emotional Response
