H ÑÒÀÒÈÑÒÈÊÈÉÍ ØÈÍÆÈËÃÝÝÑÓÄÀËÃÀÀ ÕÈÉÕ ÀÐÃÀ Ç¿ÉÍ ÇªÂËªÌÆ
10
Êîâàðèàöûã òîîöîõ
(2)
(3)
¯ç¿¿ëýëò¿¿äèéí âàðèàöûã òîîöîõ
(4)
``
``
(5)
Êîððåëÿöûí êîýôôèöèåíò:
(6)
Êîððåëÿöûí øèíæèëãýýíèé Êîððåëÿöûí êîýôôèöèåíòûí óòãààñ
õàìààðóóëàí ò¿¿íèé çýðãèéã äàðààõ áàéäëààð àíãèëíà. ¯¿íä:
1. 0=< |r| < 0.5 - Ñóë
2. 0.5=< |r| < 0.75 - Ìýäýãäýõ¿éö
3. 0.75=< |r| < 0.9 - Íÿãò
4. 0.9=< |r| < 1 - Õ¿÷òýé
5. |r| = 1 - Òºãñ áóþó ôóíêöèéí õàìààðàëòàé ãýæ òóñ òóñ
àíãèëàõ áºãººä ¿¿íýýñ òýäãýýðèéí õîîðîíäûí óÿëäàà õàìààðàë ÿìàð
áàéãààã õàðóóëíà.
Êîððåëÿöûí êîýôôèöèåíòûí òºðºë á¿ðèéí íýð òîìú¸îã ÿëãàõàä
çîðèóëñàí òàéëáàð.
Õî¸ð õóâüñàã÷òàé ðåãðåññèéí òóõàéä äàðààõ äèàãðàìààð òàéëáàðëàæ
Êîððåëÿöûí òºðë¿¿äèéí óòãà íýðèéã òîäîòãîâîë:
yxxy
n
nxyxyyxyx
n
yxyxyxyx
n
yyxx
yxCov
n
i
n
i
n
i
iiii
n
i
iiii
n
i
ii
⋅−=
+−−
=
=
+−−
=
−−
=
∑ ∑ ∑
∑∑
= = =
==
1 1 1
11
)())((
),(
n
x
x
n
i
i∑=
= 1
n
y
y
n
i
i∑=
= 1
n
yx
xy
n
i
ii∑=
= 1
22211
2
1
22
1
2
2
)2()(
)(
xxx
n
x
x
n
x
n
xxxx
n
xx
xVar
n
i
i
n
i
i
n
i
ii
n
i
i
−=+
⎟
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎜
⎝
⎛
−=
=
−−
=
−
=
∑∑
∑∑
==
==
n
x
x
n
i
i∑=
= 1
2
2
22211
2
1
22
1
2
2
)2()(
)(
yyy
n
y
y
n
y
n
yyyy
n
yy
yVar
n
i
i
n
i
i
n
i
ii
n
i
i
−=+
⎟
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎜
⎝
⎛
−=
=
−−
=
−
=
∑∑
∑∑
==
==
n
y
y
n
i
i∑=
= 1
2
2
( )( )2222)()(
),(
yyxx
yxxy
yVarxVar
yxCov
rr xy
−−
⋅−
=
⋅
==
H ÑÒÀÒÈÑÒÈÊÈÉÍ ØÈÍÆÈËÃÝÝÑÓÄÀËÃÀÀ ÕÈÉÕ ÀÐÃÀ Ç¿ÉÍ ÇªÂËªÌÆ
33
n
yyyy
y nn ++++
= −121 .....
)1.2(1
n
y
y
n
i
i∑=
=
n
nn
fff
fyfyfy
y
+++
+++
=
...
...
21
2211
Ìîìåíòûí äèíàìèê ýãíýýíèé äóíäàæ ò¿âøèí
Ìîìåíòûí äèíàìèê ýãíýýíèé ò¿âøèíã¿¿ä õîîðîíäîî èæèë çàéòàéãààð
ºãºãäñºí áàéâàë õðîíîëîãèéí ýíãèéí äóíäàæ, èæèë áèø áàéâàë
õðîíîëîãèéí æèãíýãäñýí äóíäàæèéí òîìü¸îã àøèãëàíà.
Äèíàìê ýãíýýíèé ¿íäñýí ¿ç¿¿ëýëò¿¿ä:
1. Àáñîëþò öýâýð ºñºëò
2. ªñºëòèéí õóðä
3. Öýâýð ºñºëòèéí õóðä
4. Öýâýð ºñºëòèéí õóðäèéí íýã õóâèéí óòãà
5. ªñºëòèéí äóíäàæ õóðä
ªñºëòèéí äóíäàæ õóðäûã òîäîðõîéëîõäîî ãåîìåòðèéí äóíäæèéí òîìü¸îã
àøèãëàíà.
)5.2(...... 1321 ∑⋅⋅⋅⋅= −
n
nn KKKKKK
Äýýðõ 2 òîìü¸îíîîñ ëîãàðèôì àâáàë:
)8.2(
1
lglg
lg 1
−
−
=
n
yy
K n
ãýæ øóãàìàí õýëáýðò îðæ áàéíà
2.2 Äèíàìèê ýãíýýíèé øèíæèëãýý õèéõ àðãà ç¿é
)3.2(
1
2
...
2
132
1
−
+++++
=
−
n
y
yyy
y
y
n
n
)4.2(
2
)(...)()(
1
1
11232121
∑
−
=
−− ++++++
= n
i
i
nnn
t
tyytyytyy
y
)6.2(.... 1
1
1
12
1
3
4
2
3
1
2
−−
−−
−
=⋅⋅⋅⋅= n
n
n
n
n
n
n
y
y
y
y
y
y
y
y
y
y
y
y
K
)7.2()lglg....lg(lg
1
lg 121 nn KKKK
n
K ++++= −
)2.2(
1
1
∑
∑
=
=
= n
i
i
n
i
ii
f
fy
y