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Basic Analysis and Graphing - SAS

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214 Performing Contingency <strong>Analysis</strong> Chapter 6<br />

Statistical Details for the Contingency Platform<br />

χ 2 = --------------------- ( O – E)2<br />

E<br />

where O is the observed cell counts <strong>and</strong> E is the expected cell counts. The summation is over all cells. There<br />

is no continuity correction done here, as is sometimes done in 2-by-2 tables.<br />

Statistical Details for the Details Report<br />

Lists the singular values of the following equation:<br />

– 0.5<br />

D r<br />

– 0.5<br />

( P – rc' )D c<br />

where:<br />

• P is the matrix of counts divided by the total frequency<br />

• r <strong>and</strong> c are row <strong>and</strong> column sums of P<br />

• the Ds are diagonal matrices of the values of r <strong>and</strong> c

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