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Theory Measurement and Mathematics
Proportions Percentages and Ratios
Frequency Distributions and Graphic Presentation
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05 level actually analysis of variance approximately assume assumptions cell cent Negro Chap chapter cluster sampling column computing confidence interval control variable correct correlation coefficient critical region degrees of freedom difference difference-of-means test discussed equal estimate exactly example explained fact factor formula given guessed mean income independent variables indicate individuals interaction interval scale involves large number larger least-squares equation least-squares line level of measurement linear Mann-Whitney test mathematical median method multiple nominal scale normal curve Notice null hypothesis obtain ordinal scales ordinarily parameter partial correlation percentages possible predict probability of getting problem procedure proportion quantity ranks ratio refer regression equation reject the null relationship relatively represents sample means sampling distribution scores selected significance level simple random sample social standard deviation standard error stratified sampling subcell subtracting sum of squares Suppose Table theoretical tion total number unexplained usually variation zero