MAT 222 Midterm: MAT222Formulas-2008Spring
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Confidence interval for lnean "1 (o knowl); x+ ?a: Sarnple size fo confidcnce interval for p with nrargin of errol m: Ln, l: z statistic for, ll : =p0(o known): t=o-"! ol^ln. One-s mple 1statistic fol li : . r= r (o unknown): r_,,- t-""2, s/jn df n-1. Two-sa ple z statistic for 116: l = r2(o , o2. Pooled lwo-sample l sralistic for i"10 : l = p2 wlreno1= o2: - dt -nt +n2-2 (x - 12 -( t - t2) . r - 12 wheno1= o2: (i -x2l1r{sn,i- r:. "lj r r n2 l r dl n +n2 -2. Two-sarnple f statistic for h0:o"l = o2 : S df= u - i (nurnerator), n2 -1 (denonrinator). The standard ellor of : tt=-:-a----r:- l- p) cp^ - -/p( + z-*se- z statistic fbr ho ;p = p0 known): "fwo-sample i statistic for ijo : pl = p2 ( ol , 02 unknown):
