Iqt-2 guruh talabasi Muqumova Rohilaning

Nuqtalidiagrammaniyasaymiz.

Nuqtali diagrammadan ko‘rinib turibdiki, X va Y o‘zaro musbat korrelyatsiyalangan bog‘langan.
Chiziqli model
Chiziqli modelni quramiz. Bu bizga bu ikki o‘zgaruvchi qanday chiziqli bog‘langanligini ko‘rsatadi.

2. 
   Chiziqli modelda Y X orqali ifodalanadigan regressiya tenglamasi quyidagi ko‘rinishda bo‘ladi:
   

Y=134,9-0,000058X

3. 
   Bu modelda X yordamida Y ning 28,5 % ini tushuntirish mumkin.
   
4. 
   Kvadratik model
   

5. 
   Kvadratik model tenglamasi quyidagi ko‘rinishga ega:
   
6. 
   Y= 138,4-0,000177X+0,000000* X².
   
7. 
   Bu model X yordamida Y ning 42,3 % ini tushuntirish mumkin ekan.
   
8. 
   Kubik model
   

9. 
   Berilgan masala uchun kubik model tenglamasi quyidagicha bo‘ladi:
   
10. 
    Y= 139,0-0,000222X+0,000000*X² -0,000000*X³.
    
11. 
    Kubik modelda determinatsiya koeffitsenti R² =0,42. Ya’ni biz bu regressiya tenglamasi yordamida Y ning42,6 % ni tushuntirib bera olamiz.
    
12. 
    Regression Analysis: Y versus X
    
13. 
    
14. 
    The regression equation is
    
15. 
    Y = 134,9 - 0,000058 X
    
16. 
    
17. 
    
18. 
    S = 10,2576 R-Sq = 28,5% R-Sq(adj) = 24,5%
    
19. 
    
20. 
    
21. 
    Analysis of Variance
    
22. 
    
23. 
    Source DF SS MS F P
    
24. 
    Regression 1 754,39 754,391 7,17 0,015
    
25. 
    Error 18 1893,92 105,218
    
26. 
    Total 19 2648,31
    
27. 
    
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29.