Exhibit 12-9A regression and correlation analysis resulted in the ...

[jany123]

Question 1

Exhibit 12-8
The following information regarding a dependent variable Y and an independent variable X is provided
 

n = 4

ΣX = 90

ΣY = 340

Σ (Y -)(X - ) = -156

Σ (X - )²= 234

Σ (Y - )²= 1974

SSR = 104

 

Refer to Exhibit 12-8. The coefficient of correlation is

◦

-0.2295

◦

0.2295

◦

0.0527

◦

-0.0572

Question 2

Exhibit 12-9
A regression and correlation analysis resulted in the following information regarding a dependent variable (y) and an independent variable (x).
 

n = 10

ΣX = 90

ΣY = 170

Σ (Y -)(X - ) =  = 466

Σ (Y - )²= = 1434

Σ (X - )²= 234

SSE = 505.98

 

Refer to Exhibit 12-9. The least squares estimate of b₁ equals

◦

0.923

◦

1.991

◦

-1.991

◦

-0.923

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[jany123]

YES! Correct, THANKS for helping me on my review

[amynguyen1221]

Thanks for the timely response, appreciate it