EXERCISES IN QUANTITATIVE METHODOLOGY analysis of variance, between-groups variance, between-subjects design, cell (row/column combination), central tendency (mean, median, mode), descriptive statistics, confidence level, contingency table, control, control condition, control group, control variable, correlation, correlation coefficient, correlational research, counterbalancing, criterion, cross-over interaction, degrees of freedom, dependent variable, descriptive statistics, design, difference, directional/non-directional statistical tests, experimental control, experimental design, experimental group, factorial design, F-ratio, F test, frequency distribution, generalizability, hypotheses testing, histogram, independent variable, individual differences, inferential statistics, interactions, main effect, Mann-Whitney U test, normal curve, normal distribution, non-parametric statistics, null hypothesis, null result, one- and two-tailed tests, parametric statistics, Pearson's product moment correlation coefficient (r), point bi-serial correlation coefficient, range, regression, significance level, skewed distribution, standard deviation, standard error of the mean, standard normal distribution, standard scores, sum of squares, t-test, type 1 error, type 2 error, variance, Wilcoxon signed-ranks test, within-groups variance, within subjects design, X2 test for independence