Scatter plots exemplifying three correlation outcomes. A. Scatter plot for the parameter AgeBias <1 yr with correlation coefficient r = 0.005 (Table 3). Correlation coefficients near 0 indicate weak, negligible relationships. B. Corresponding scatter plot for the parameter Class size (school) (r = 0.446) is shown. C. Scatter plot showing a strong, positive linear relationship. The parameter analyzed is Group size (DCCs) with correlation coefficient r = 0.948.