On Further Methods of Determining Correlation

Cover On Further Methods of Determining Correlation
On Further Methods of Determining Correlation
Karl Pearson
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Table I. gives the values of r and R for each '05 for p^ .
Table 11. gives the values of r and p„ for each '05 of i2, and in the last column the value of /)„ which would arise if (xxv) were correct.
Table I. Correlation of Variates from Mean Square Difference of Grades.
I ft.
r H ft] r R i -00 •000 •000 •50 •518 •323 ■05 •052 •029 •55 •368 •361 •10 •105 •059 •60 •618 •400 •15 •157 •089 •65 •668 •442 ; -20 •209 •120 •70 •717 •4«6 ' -23 •261 •152 •75 •765 •533 , -30 •313 •184 •80 •813 •684 \ -35
...•364 •217 •85 •861 •644 •40 •416 •251 •90 •908 •709 1 •45 •467 •286 •95 •954 •796 •50 •518 •323 1^00 1^000 1^000 Table II. Correlation of Variates from Difference of Grades.
R t r P,i rixv) 1 It r Pw (XXV) •00 •000 •000 •000 1 •50 •732 •716 •707 •05 •089 •085 •078 1 •55 •782 •767 •760 •10 •176 •168 •156 •60 •827 •814 •809 •15 •259 •248 •233 •65 •867 •856 •853 •20 •338 •324 •309 •70 •902 •894 •891 •25 •414 •398 •383 •75 •932 •926 •924 •30 •486 •469 •454 •80 •956 •952 •951 •35 •554 •536 •522 •85 •975 •973 •972 •40 •618 •600 •587 1 •90 •989 •988 •988 •45 •677 •660 •649 •95 •997 •997 •997 •50 1 •732 •716 •707 100 1-000 lOOO 1000 Now these Tables bring out several interesting facts.


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