. Bulletins of American paleontology. Review of the Bullia CJroup: Allmon 37 Two types of multivariate analyses were performed jn the data matrix using the SPSS-X programming package (SPSS, 1983). I (1) A Q-mode varimax-rotated factor analysis was performed using the procedure FACTOR on the entire matrix. Missing values were replaced by SPSS-X by their means calculated from all other cases in the total matrix. Three factors were reported, explaining a cu- mulative total of of the total variance in the original matrix (Table 6). , (2) The SPSS-X procedure DISCRIMINANT was used to pe
. Bulletins of American paleontology. Review of the Bullia CJroup: Allmon 37 Two types of multivariate analyses were performed jn the data matrix using the SPSS-X programming package (SPSS, 1983). I (1) A Q-mode varimax-rotated factor analysis was performed using the procedure FACTOR on the entire matrix. Missing values were replaced by SPSS-X by their means calculated from all other cases in the total matrix. Three factors were reported, explaining a cu- mulative total of of the total variance in the original matrix (Table 6). , (2) The SPSS-X procedure DISCRIMINANT was used to perform a discriminant analysis by the Direct Method. In this technique, all variables are entered into the analysis simultaneously, and the discriminant functions are derived directly from the entire set, re- gardless of the discriminating power of each variable. The groups specified a priori were the ibur select groups described above. Missing values within these groups PAN(14) SWH (12). were replaced with means calculated only from the other specimens in each group. Discriminant scores for the remaining specimens were then reported by the procedure in relation to these designated groups. Miss- ing values in these nonselected specimens were re- placed by SPSS-X with mean values calculated from the entire data matrix. Results Factor .-l« —Text-figure 10 shows a plot of scores on the first two factors for all 318 specimens in the analysis. The four select groups are indicated by outlines. The maryiandica-integra and suhcyiindrica- quadrata select groups form two largely nonoverlap- ping clusters, and this separation is clearer along the second factor axis than along the first. There is a high degree of overlap of the four total groups with each other. AAN(13). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origin
Size: 1362px × 1835px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpaleontologicalresearchinstitutionit, bookcentury1900
