1 The Chi squared table provides critical value for various right hand tail probabilities ‘A’. The form of the probabilities that appear in the Chi-Squared.

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Estimating a Population Variance

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Presentation transcript:

1 The Chi squared table provides critical value for various right hand tail probabilities ‘A’. The form of the probabilities that appear in the Chi-Squared table are: Probability calculations for the Chi-Squared distribution For a given value of the degrees of freedom, and for a predetermined right hand tail probability A, the table entry is the corresponding  2 A.

2  …..  2.95 …..  ……  2.05 …… Using the Chi Squared -table D.F … … … …… A=.05  DF A,  2.05,20 = ?

3 Using the Chi-Squared table – Finding Chi- squared values for left hand tail probabilities  …..  2.95 …..  ……  2.05 …… … … … …… D.F. A=.95  2.95,20 =? A=.05

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