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Formula Sheet.pdf - Formulas Chapter 3: Descriptive...

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FormulasChapter 3:Descriptive Statistics:nxx=Mean of a samplenxu=Mean of a populationσuxz=z- score()()12=nxxsStandard deviation()()()122=nnxxnsStandard deviation shortcutVariance=s2Chapter 4:Probability:P(A or B)=P A()+P B()if A,B are mutually exclusiveP(A or B)=P A()+P B()P Aand B()if A,B are not mutually exclusiveP Aand B()=P A()P B()if A, B are independentP Aand B()=P A()P B A()if A, B are dependentP A()=1P A()Rule of complements
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