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EFFECT OF ABILITY GROUPING ON VARIABILITY
EFFECT OF ABILITY GROUPING ON PUPIL ADJUST
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10-90 percentile range 25 percentile points 29 pupils 75 percentile adjustment in ability Arithmetic Computation Arithmetic Reasoning assumption average class enrollment average number Burr cent of total coefficient of variation composite scores corresponding range Cumulative Frequency difference difficulty of adjustments difficulty per ability difficulty per subject five subjects grades having three group mean groups each showed groups in grades groups per grade homogeneous grouping indicated ity Groups less than 12 measure of variability medians ment method multiple track plan need of adjustment number of pupils number of units ogive curve Paragraph Meaning percentages plan of promotion present study pupils per ability pupils per subject pupils per unselected range of achievement reducing relative variability scores deviated less standard deviation Stanford Achievement Test subject groups subject in need Table test scores three ability groups three groups total range transfer deviated less units of difficulty unselected groups variability in achievement Word Meaning YZ group