Find Regression Lines 

Method1
Method2
Method3
Method4













Solution 


Share with Your Friends :

Find Regression Lines

Method1
1. Find the equation of regression lines and estimate y for x = 1 and x for y =4.
X 
3 
2 
1 
6 
4 
2 
5 
7 
Y 
5 
13 
12 
1 
2 
20 
0 
3 
Method1
2. Find the equation of regression lines and correlation coefficient from the follwoing data.
X 
28 
41 
40 
38 
35 
33 
46 
32 
36 
33 
Y 
30 
34 
31 
34 
30 
26 
28 
31 
26 
31 
Method2
5. The regression equation of two variables are
5y = 9x  22
20x = 9y + 350
Find the means of x and y. Also find the value of r.
Method2
6. The regression equations of two variables are
x + 2y  5 = 0
2x + 3y  8 = 0
Variance of x = V(x) = 12.
Find x, y and V(y).
Method3
3. The following information is obtained form the results of examination

Marks in Stats 
Marks in Maths 
Average 
39.5 
47.5 
S.D. 
10.8 
16.8 
The correlation coefficient between x and y is 0.42. Obtain two regression lines and estimate y for x = 50 and x for y = 30.
Method4
4. The follwoing information is obtained for two variables x and y. Find the regression equations of y on x.
S XY = 3467 
S X = 130 
S X^2 = 2288 
n = 10 
S Y = 220 
S Y^2 = 8822 



