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- W2229596395 abstract "Several techniques have been developed fOr creating continuous smooth 'distributions of test norms: This'paper describes / 6 two studies that explore the behavior. of cubic spline's in order to 'determine their appropriateness for use in test ormins. The first study uses data from the Curriculum Referenced Tests of Mastery (CRTM) and employs two smoothing techniques in determining distributions' of percentile ranks (PR). Method 1 calculated PR values from cumulative frequency cents of rtw.scoresvalues and then smoothed them to create a continuous distribution. Method 2 roothea the raw frequencies to create the continuous distribution. The second study was designed to generate a theoretical-population, sample repeatedly from it, and smooth, the results in a comparative, study of the two :,procedures. Both studies showed that spline Amoothing techniques are * convenient and economical procedure foranalytically smoothing ,test score distributions and generally give good results. . The second;study found that, of the methodd, method 2-produVed better results and was more robust with regard to the choice of smoothing parameter. Both methods,were easy., efficient and.economical to use. Statisticel tables of ,standard deviations and means are included. (EGS) ********************************************************************W** Reproductions.supplied by EDRS are the best thnt'can be made * from the original document. *******************p*****************************.****************t**** U.S. DEPARTMENT OF EDUCATION NATIONAL INSTITUTE OF EDUCATION EDUCATIONAL RESOLMCES, INFORMATION CENTER I ERICI ( This document has :'been reproduced as received frgm the person or organization originating it. U .Minor changes have been made to improve reproduction quality. Points of View or opinions staled in this document do not necessarily repent official NM position or policy." @default.
- W2229596395 created "2016-06-24" @default.
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- W2229596395 date "1984-04-01" @default.
- W2229596395 modified "2023-09-24" @default.
- W2229596395 title "An Investigation of Two Procedures for Smoothing Test Norms." @default.
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