Basic Statistical Methods, Número 1000

analysis of variance APPENDIX A Continued arithmetic average axis binomial binomial distribution biserial centile point centile rank chance Chapter chi-square computed confidence interval correction correlation coefficient criterion data in Table degrees of freedom difference divided drawn equal equation error of estimate Ex² example expected frequencies Figure following formula frequency distribution frequency polygon grades graph illustrate individuals item analysis median method midpoint multiplying N₁ N₂ normal curve normal distribution null hypothesis number of degrees parameter Pearson percent level percent value percentage phi coefficient point-biserial population predicted predictor problem proportion random sample ratio raw score relationship reliability coefficient sampling distribution scale scatterplot skewed smaller square root standard error standard score statistical tests student subtract sum-of-squares Suppose tails technique test of significance test scores testing the significance two-tailed test validity values in column variables X₁ z score zero ΣΧ Σχε