Table 3

Means and Standard Deviations for Posttest by Ability Group Status and Condition

ConditionAbility LevelOperation Error 2Computation Error 2Careless Error 2Unidentified Error 2Omission Error 2Total Errors 2
ComparisonLA2.721.641.061.291.147.86
(2.113)(1.386)(.972)(1.774)(1.430)(2.681)
AA2.35 1.291.12.59.886.24
(1.367)(1.448)(.928)(1.372)(1.219)(2.773)
LD4.582.17.672.08.5810.08
(3.450)(2.038)(.651)(2.968)(.996)(3.554)
TreatmentLA2.49.971.00.921.717.09
(2.230)(1.075)(1.000)(1.429)(2.590)(2.448)
AA1.30.59.88.51.864.14
(1.264)(.960)(.850)(.901)(2.109)(2.691)
LD2.76.92.63.87.876.05
(2.223)(1.124)(.819)(1.742)(1.339)(2.885)
Note: For ability level variable, the first row is the mean and the second row, in parentheses, is the standard deviation.

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