Ekonometrik model – bu

Agar X va Y omillar o`rta kuchli 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 < .
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Agar X va Y omillar kuchli bog`lansa, korrelyatsiya koeffitsienti Rxy qaysi oraliqda o`zgaradi?
====
0< Rxy <0,3;
====
0,4 <= Rxy <= 0,6;
====
#0,6 < Rxy <= 0,96;
====
(-) < Rxy < .
++++
Styudent mezoni qaysi jarayonni aniqlaydi?
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Omillar orasidagi bog`lanish zichligini;
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Olingan modelning o`rganilayotgan jarayonga mosligini;
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#Olingan modeldagi koeffitsientlarning ahamiyatliligini, korrelyatsiya koeffitsientining ishonchliligini;
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Korrelyatsiya koeffitsientining ishonchliligini.
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Regressiya modelidagi koeffitsientlar ahamiyatli deyiladi, agar:
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#Styudent mezonining hisoblangan qiymati jadvaldagi qiymatidan katta bo`lsa;
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Styudent mezonining hisoblangan qiymati jadvaldagi qiymatidan kichik bo`lsa;
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Styudent mezonining hisoblangan qiymati jadvaldagi qiymatiga teng bo`lsa;
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Styudent mezonining hisoblangan qiymati 0 ga teng bo`lsa.
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Agar Y = V + W bo`lsa, Cov(X, Y) aniqlovchi bandni ko`rsating:
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#Cov(X, Y) = Cov(X, V) + Cov(X, W);
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Cov(X, Y) = Cov(X, bZ) = bCov(X, Z);
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Cov(X, Y) = Cov(X, = 0;
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Cov(X, Y) = Cov(X, V).
++++
Agar Y = bZ (bu erda b - konstantbo`lsa, Cov(X, Y) aniqlovchi bandni ko`rsating:
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Cov(X, Y) = Cov(X, V) + Cov(X, W);
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#Cov(X, Y) = Cov(X, bZ) = bCov(X, Z);
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Cov(X, Y) = Cov(X, = 0;
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Cov(X, Y) = Cov(X, V).
++++