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Yule’s Y, also known as the coefficient of colligation, is a measure of association between two binary variables. The measure was developed by George Udny Yule in 1912. .〔Michel G. Soete. A new theory on the measurement of association between two binary variables in medical sciences: association can be expressed in a fraction (per unum, percentage, pro mille....) of perfect association (2013), e-article, BoekBoek.be〕 ==Formula== For a 2X2 table for binary variables X and Y with frequencies or proportions : a formula is given by: : Yule's Y is closely related to the odds ratio as is seen in following formula: : Yule's Y varies from -1 to +1. -1 reflects total negative correlation, +1 reflects perfect positive association while 0 reflects no association at all. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Coefficient of colligation」の詳細全文を読む スポンサード リンク
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