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Theory Measurement and Mathematics
Proportions Percentages and Ratios
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05 level actually analysis of variance approximately assume assumptions causal cell cent Negro Chap chi square cluster sampling column computing confidence interval control variable correlation coefficient critical region degrees of freedom denominator dependent difference difference-of-means test discussed effect equal error term estimate exactly example expected frequencies explained fact factor formula given independent variables indicate individuals interval scale involves large number larger least-squares equation least-squares line level of measurement linear Mann-Whitney test median method nominal scale nonlinear null hypothesis obtain ordinarily pairs partial correlation percentages population possible predicted probability of getting problem procedure proportion quantity ranks ratio regression equation reject the null relationship relatively represents sample means sampling distribution scores selected significance level simple random sample slope standard deviation standard error stratified sampling subtracting sum of squares Suppose Table tion total number unexplained variation zero