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A discriminant analysis method, called the WHIDD-analysis is presented. It is rather similar to Holley's G-analysis. However, it does not utilize any component analysis and is thus cheaper and simpler to use. The WHIDD-analysis uses the weighted H-index as the E-correlation coefficient. In two...
The structure of adolescent self-concept was examined across the age span of 13 through 18 years. Six thousand students in grades 7 thru 12 who completed the Self Observation Scales Junior and Senior High Level comprised the student population. Six homogeneous age and grade groups were selected....
A computer program written in BASIC is described which performs two-way analysis of variance based on the mean, standard deviation, and group size. Output lists a full analysis of variance table.
This study examined (1) the predictive validity of the Differential Aptitude Tests (DAT) relative to achievement criteria for seniors in a high school for engineering as measured by (a) the students' ( N = 89) grades in engineering, mathematics, and science courses and (b) cumulative grade point...
A 34 item scale entitled Statistics Attitude Survey (SAS) was developed and administered to three samples of students taking a beginning statistics course. Analyses showed that the scale was highly homogeneous and that total scale scores had moderate correlations with statistics grades.
Four cases pertaining to estimating the correlation between variables Y and Z from various amounts of information associated with the bivariate frequency distributions of X and Y and of X and Z are considered. A computer program for estimating the correlation between variables Y and Z when the...
Following a method to analyze split-plot designs which have one "between subjects" variable with unequal n, and one "within subjects" variable, an extension is suggested to analyze more complicated designs. The technique presented is based on a program in Statistical Package for Social Sciences...
For the years of 1973, 1974, and 1975, the Instructional Improvement Questionnaire (IIQ) was used as the campus-wide teacher and course evaluation instrument at Southern Illinois University at Carbondale. In order to assess the stability of the factors being measured by the instrument, separate...
Test-retest correlations can lead to biased reliability estimates when there is instability of the true scores in the interval between tests and/or when the measurement errors are correlated. Using three occasion data on the Test of Standard Written English and essay ratings, an analysis is...
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