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lkekftd 'kks/ dh i¼fr
uksV 29-4 lg&lacaèk eki djus dh fofèk;k¡ (Methods of Measurement of Correlation)
nks ;k vfèkd Jsf.k;ksa esa lg&lacaèk fuEu fofèk;ksa }kjk ekywe fd;k tk ldrk gSµ
(i) izdh.kZ vkjs[k (Scatter Diagram)
(ii) lg&lacaèk ¯cnq&js[kh; fp=k (Correland Graph)
(iii) lg&lacaèk dk xq.kkad (Coefficient of Correlation)
(iv) lg&lacaèk lkj.kh (Correlation Table)
29-5 izdh.kZ ;k fo{ksi vkjs[k (fp=k) (Scatter Diagram or Dotogram)
blesa lg&lacaèk fp=kksa dh lgk;rk ls izn£'kr fd;k tkrk gS ijarq buesa lg&lacaèk la[;kRed :i esa u gksdj
osQoy vuqeku osQ :i esa izkIr gksrk gSA blosQ cukus dh fofèk Bhd ¯cnq&js[kh; fofèk dh Hkk¡fr gSA blosQ fy;s
,d vksj x Js.kh vkSj nwljh vksj y Js.kh dk iSekuk eku fy;k tkrk gSA blosQ ckn x Js.kh osQ izR;sd in&ewY;
vkSj y Js.kh osQ izR;sd in&ewY; dks ¯cnqvksa osQ :i esa fn[kk;k tkrk gSA ,d in osQ nksuksa ewY;ksa (x rFkk y Js.kh)
osQ fy;s ,d&,d ¯cnq gksrk gSA bl izdkj ftrus in;qXe (Pairs of items) gksrs gSa mrus gh ¯cnq gks tkrs gSaA
29-6 lg&lacaèk ¯cnq&js[kh; fp=k (Correlation Graph)
lg&lacaèk osQ fo"k; esa tkuus osQ fy;s ¯cnq&js[kh; fp=kksa (Graph) dk Hkh iz;ksx fd;k tkrk gSA bl fofèk easa
nksuksa in&Jsf.k;ksa (x rFkk y) dh dksfV (Ordinate) vFkok [kM+h js[kk (Vertical Line) ij rFkk la[;k] le;
vFkok LFkku dks iM+h js[kk (Horizontal Line) ij vafdr fd;k tkrk gSA ;fn nksuksa Jsf.k;ksa osQ ¯cnq&js[kk ,d
gh fn'kk esa vkxs c<+rs gSa rks èkukRed lg&lacaèk gksxkA blosQ foijhr ;fn nksuksa in&Jsf.k;ksa osQ ¯cnq&js[kk nks
foijhr fn'kkvksa esa tkrs gSa rks ½.kkRed lg&lacaèk gksrk gSA ;fn nksuksa Jsf.k;ksa esa vfèkd varj u gks rks nksuksa
¯cnq&js[kk,¡ ,d gh iSekus vkSj vkèkkj&js[kk ij [khaph tk ldrh gSaA ;fn muesa cgqr vfèkd varj gks rks nksuksa osQ
fy;s vyx&vyx iSekuksa dk iz;ksx vko';d gSA
Lo&ewY;kadu (Self Assessment)
fjDr LFkkuksa dh iw£r djsaµ
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1- bl lg&lacaèk fp=kksa dh lgk;rk ls fd;k tkrk gS] ijarq blesa lg&lacaèk la[;kRed :i esa u
gksdj osQoy vuqeku osQ :i esa izkIr gksrs gSaA
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2- blesa cukus dh fofèk Bhd fofèk dh Hkk¡fr gSaA
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3- ;fn nksuksa Jsf.k;ksa osQ ¯cnq&js[kk ,d gh fn'kk esa vkxs c<+rs gSa rks gksxkA
29-7 lg&lacaèk dk xq.kkad (Coefficient of Correlation)
nks pyksa osQ chp osQ lg&lacaèk dk ifjek.k (degree) vFkok foLrkj (extent) tkuus osQ fy;s lg&lacaèk osQ
xq.kkad dh x.kuk dh tkrh gSA lg&lacaèk osQ xq.kkad dh x.kuk dbZ fofèk;ksa osQ }kjk dh tk ldrh gS] ij muesa
dkyZ fi;lZu (Karl Pearson) dk lw=k lcls vPNk vkSj yksdfiz; gSA
282 LOVELY PROFESSIONAL UNIVERSITY
