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### 29 Cards in this Set

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 CI Confidence interval d Cohen’s measure of effect size (standardized mean difference) df Degrees of freedom E Expected value in a cell of contingency table Ha or H1 H sub a or H sub one Alternate hypothesis H0 H sub zero Null hypothesis n Sample size N Population size O Observed value in a cell of contingency table p p value Probability of a statistic occurring by chance r Sample correlation coefficient S Sample standard deviation S2 s squared Sample variance Sp s sub p Pooled standard deviation Sx s sub x-bar Sample standard error of the mean; standard deviation of sampling distribution t t value t value from Student’s t distribution _ x X-bar Sample mean; mean of x values Z Z score Standard normal deviate α alpha Significance level (Type I error) β beta Beta (Type II error) or Slope of population regression line χ2 chi-square Test statistic for contingency table δ delta Mean difference of population observations Δ delta (capital delta) Change μ mu Population mean σ sigma Population standard deviation σ2 sigma squared Population variance σ- x sigma sub x-bar Standard error of the mean Σ the sum of (capital sigma) Sum the values that follow ρ rho Population correlation coefficient