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lkekftd 'kks/ dh i¼fr
uksV laf{kIr fofèk }kjk lekUrj ekè; (M) dk lw=kµ
∑ f d ∑ f d
M = A + vFkok A +
n ∑ f
;gk¡ A = 10.5 (dfYir ekè;)
∑ fd = $ 148
∑ f ;k n =44 ([ksrksa dh oqQy la[;k)
148 37
∴ M = 10.5 + = 10.5 + = 10.5 + 3.36
44 11
= 13.86
27-6 lekUrj ekè; osQ xq.k (Merits of Arithmetic Average or Mean)
ekè; izo`fÙk dks ekius osQ lk/u osQ :i esa lekUrj ekè; osQ egÙo dks lHkh Lohdkj djrs gSa D;ksafd
blosQ fuEu xq.k gSaµ
(1) lekUrj ekè; Li"Vr% ifjHkkf"kr gksrk gS vkSj blhfy;s mlosQ lEcU/ esa fdlh dks Hkh dksbZ lUnsg
ugha gksrkA
(2) lekUrj ekè; dh x.kuk vR;Ur ljy gksrh gS vkSj blhfy;s ekè; fudkyus osQ fy;s xf.kr lEcUèkh
mPpLrjh; Kku dh vko';drk ugha gksrh gSA
(3) pw¡fd lekUrj ekè; dh x.kuk vR;Ur ljy gksrh gSA blfy;s blls vf/dkf/d O;fDr ykHk mBk
ldrs gSaA D;ksafd lkekU; xf.kr tkuus ls Hkh os ekè; fudky ldrs gSaA
(4) lekUrj ekè; fudkyus osQ fy;s fofHkUu Jsf.k;ksa osQ vadksa dks fdlh O;ofLFkr ozQe esa j[kus dh
vko';drk ugha iM+rhA vad tSls Hkh fn, gksrs gSa mlh :i esa mudk iz;ksx djosQ ekè; fudkyk
tk ldrk gSA D;ksafd blesa tksM+us] Hkkx nsus vkSj ?kVkus dk gh dke osQoy djuk iM+rk gSA
(5) lekUrj ekè; fudkyus osQ fy, Jsf.k;ksa (series) osQ lHkh inksa osQ ckjs esa tkudkjh vko';d
ugha gSA ;fn vadksa dk vFkok in osQ ifj.kkeksa dk oqQy ;ksx ,oa mudh la[;k Hkh ekywe gS
rks muosQ }kjk lekUrj ekè; Kkr fd;k tk ldrk gSA blh izdkj ;fn nks ;k nks ls vf/d Jsf.k;ksa
esa izR;sd dk lekUrj ekè; Kkr gks rks lHkh Jsf.k;ksa dk lfEefyr (combined) lekUrj ekè;
Kkr fd;k tk ldrk gSA
(6) lekarj ekè; esa Jsf.k;ksa osQ NksVs ,oa cM+s lHkh izdkj osQ inksa osQ ifj.kkeksa dks egÙo fn;k tkrk
gS vkSj izR;sd in dh x.kuk osQoy ,d ckj gksrh gSA fdlh in ewY; dh u rks mis{kk dh tkrh
gS vkSj u vf/d egÙo fn;k tkrk gSA
(7) lekarj ekè; rqyukRed vè;;u osQ fy, vR;Ur mi;ksxh gksrk gSA
27-7 lekUrj ekè; osQ nks"k (Demerits of Arithmetic Average)
mijksDr xq.kksa osQ gksrs gq, Hkh lekUrj ekè; osQ oqQN vius nks"k gSa tks fd bl izdkj gSaµ
(v) ;g lEHko gS fd lekarj ekè; ,sls ifj.kkeksa dks izLrqr djsa tks fd okLro esa vlEHko gksa tSls
fdlh LVs'ku ij izfrfnu mrjus okys ;kf=k;ksa dh la[;k dk lekUrj ekè; 200-45 gks ldrk gSA ¯drq
okLro esa 200-45 O;fDr fdlh Hkh LVs'ku ij dHkh Hkh ugha mrjrs gksaxsA mlh izdkj izfr ek¡ cPpksa dh
238 LOVELY PROFESSIONAL UNIVERSITY
