Spearman ' s rank correlation coefficient 史匹曼等級相關(guān)系數(shù)
In the first part of this article , the problem of heteroscedasticity is put forward . the serious effect is also stated . in the first section of the second part , several commonly cited testing methods are introduced , such as graph method , spearman rank correlation coefficients test , park test , glejser test and goldfeld - quandt test 在第二節(jié)中,首先綜述了各種文獻(xiàn)中給出的常用的檢驗異方差的方法,它們有圖示法、斯皮爾曼( spearman )的秩相關(guān)系數(shù)檢驗法、帕克( park )檢驗法、格萊舍爾( glejser )檢驗法、戈德菲爾德-匡特( goldfeld - quandt )檢驗法。
X2 test with 2 2 contingency table and ochiai indices were used to analyze the interspecific association of 12 dominant species of meadow community and 20 dominant species of scrub community and 18 dominant species of tree community . pearson ' s correlation coefficient and spearman ' s rank correlation coefficient were also applied to calculate correlations between species 在該地區(qū)植被的優(yōu)勢種的種間關(guān)系的研究方面,運(yùn)用2 2列聯(lián)表、 x ~ 2檢驗方法對群落優(yōu)勢種進(jìn)行總體相關(guān)性和種對間的聯(lián)結(jié)性檢驗,利用共同出現(xiàn)百分率jaccord指數(shù)測定種對間的關(guān)聯(lián)度,應(yīng)用pearson相關(guān)系數(shù)和spearman秩相關(guān)系數(shù)刻畫種對間的數(shù)量變化關(guān)系。