Ekonometrik model – bu

Dispersiyani (torttirilmagan) aniqlovchi bandni ko`rsating:
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#Sigma^2 = [SUMM(X-Xo′rt)^2]/n;
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Sigma^2 = [SUMM(X-Xo′rt)^2 * m]/SUMM(m);
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Sigma = SQRT [SUMM(X-Xo′rt)^2]/n;
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Sigma = SQRT [SUMM(X-Xo′rt)^2 * m]/SUMM(m).
++++
Dispersiyani (torttirilgan) aniqlovchi bandni ko`rsating:
====
Sigma^2 = [SUMM(X-Xo′rt)^2]/n;
====
#Sigma^2 = [SUMM(X-Xo′rt)^2 * m]/SUMM(m);
====
Sigma = SQRT [SUMM(X-Xo′rt)^2]/n;
====
Sigma = SQRT [SUMM(X-Xo′rt)^2 * m]/SUMM(m).
++++
O`rtacha kvadratik farqni (torttirilmagan) aniqlovchi bandni ko`rsating:
====
Sigma^2 = [SUMM(X-Xo′rt)^2]/n;
====
Sigma^2 = [SUMM(X-Xo′rt)^2 * m]/SUMM(m);
====
#Sigma = SQRT [SUMM(X-Xo′rt)^2]/n;
====
Sigma = SQRT [SUMM(X-Xo′rt)^2 * m]/SUMM(m).
++++
O`rtacha kvadratik farqni (torttirilgan) aniqlovchi bandni ko`rsating:
====
Sigma^2 = [SUMM(X-Xo′rt)^2]/n;
====
Sigma^2 = [SUMM(X-Xo′rt)^2 * m]/SUMM(m);
====
Sigma = SQRT [SUMM(X-Xo′rt)^2]/n;
====
#Sigma = SQRT [SUMM(X-Xo′rt)^2 * m]/SUMM(m).
++++
Eng kichik kvadratlar usuli quyidagi formula bilan ifodalanadi:
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S=SUMM(Y-Yt o′rt)^2 → max;
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S=SUMM(Yt o′rt - Y)^2 → min;
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#S=SUMM(Y-Yt o′rt)^2 → min;
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S=SUMM(Y+Yt o′rt)^2 → min.
++++
Bir omilli chiziqli bog`lanishni ko`rsating:
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#Yx = a0 + a1X;
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Yx = a0 + a1X1 + a2X2;
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Yx = a0 + a1X^2;
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Yx = a0 + a1^X.
++++
Agar X va Y omillar kuchsiz bog`lansa, korrelyatsiya koeffitsienti Rxy qaysi oraliqda o`zgaradi?
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#0< Rxy <0,3;
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0,4 <= Rxy <= 0,6;
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0,6 < Rxy <= 0,96;
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(-) < Rxy < .
++++