II. III. Formulas and Tables for AP Statistics Descriptive Statistics f=i~ =$ sx= nilEhlz Z(::1E)2 j} = a + bx E = a + bf r=,,112["f][f] Probability and Distributions P{Au3)= P(A)+P(B)P(An3) P(A|B)=% If X has a binomial distribution with parameters a and p, then: PM = X) = [j P'(1 - P)\" where x = 0, 1,2,3, ,n If X has a geometric distribution with parameter p, then: P(X = x) =(1 p)\" p where x = 1,2,3, Sampling Distributions and Inferential Statistics statistic parameter Standardized test statistic: ._ standard error of the statistic Condence interval: statistic i (critical value)(standard error of statistic) erved expected): expected b Chi-square statistic: 2'2 = 2(0 S