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Confidence Interval/ Other Information Flashcards

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63883521Mean One Sample (Population σ is known)xbar± z* (σ/√[n])
63883522Mean One sample (Population σ is not known)xbar± t* (s/√[n]); df = n-1
63883523Matched Pairsxbar± t* (s/√[n]); where xbar is the average difference in pairs and s is the standard deviation of the average diff's; df = n-1, where n is the # of pairs
63883524Proportion One Samplephat± z*√(phatqhat/n)
63883525Mean Two Sample (Population σ1 and σ2 not known)xbar1-xbar2± t*√(S²1/n1+S²2/n2); df = smaller of n1-1 and n2-1 (or use answer on calculator)
63883526Proportion Two Sample(phat1-phat2)± z*SE; where: SE = √(phat1qhat1/n1+phat2qhat2/n2)
63883627X² Test of Goodness of Fit (Homogeneity [all proportions equal])Size: n x 1 matrix; df = n-1
63884262X² Test of Association of Independence/ Slope of Population Regression LineExpected Cell Value = (RowTotal)(ColumnTotal); confidence Interval: b± t*SEb; where SEb = s/√(Σ[x-xbar]²); df = n-2

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