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Stat A1

The document presents a calculation for a regression formula using values of X and Y. It derives coefficients A and B, resulting in the equation Y = 68 - 3X. By substituting X with 10, the calculated value of Y is 38.

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18 views1 page

Stat A1

The document presents a calculation for a regression formula using values of X and Y. It derives coefficients A and B, resulting in the equation Y = 68 - 3X. By substituting X with 10, the calculated value of Y is 38.

Uploaded by

tayyab
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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X Y X.Y X.

X
3 55 165 9
12 40 480 144
6 55 330 36
20 10 200 400
14 15 210 196
=14 =175 =1385 =196

TO FIND A:

∑ Y . ∑ X 2−∑ X . ∑ XY
=
N . ∑ X 2−(∑ X )2
175.785−55.1385
=
5.785−552
= 68

TO FIND B:

N . ∑ X Y −∑ X .∑ Y
2 2
N . ∑ X −(∑ X )
5.1385−55.175
2
5.785−( 55)
= -3

A AND B REGRESSION FORMULA

Y= A+B.X

Y= 68-3.X

REPLACE X BY 10

Y= 68-3(10)

Y=68-30

Y=38

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