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regression
question image
Asked by jaishreepatidar2 | 18 Dec, 2022, 14:59: PM
answered-by-expert Expert Answer
To find the coefficient correlation between x and y
 

xi

yi

xiyi

x2

y2

3

6

18

9

36

4

8

32

16

64

5

10

50

25

100

7

14

98

49

196

8

16

128

64

256

10

20

200

100

400

Sum xi = 37

Sum yi= 74

Sum xiyi = 526

Sum x2 = 263

Sum y2 = 1049

 
C o r r e l a t i o n space c o e f f i c i e n t space b e t w e e n space x space a n d space y space i s space g i v e n space b y
left parenthesis r right parenthesis equals fraction numerator begin display style sum for blank of end style x y minus begin display style fraction numerator begin display style stack left parenthesis sum x with blank below end style right parenthesis left parenthesis sum for blank of y right parenthesis over denominator N end fraction end style over denominator square root of sum for blank of x squared minus begin display style open parentheses sum for blank of x close parentheses squared over N end style end root square root of sum for blank of y squared minus open parentheses sum for blank of y close parentheses squared over N end root end fraction
equals fraction numerator 526 minus begin display style fraction numerator 37 cross times 74 over denominator 6 end fraction end style over denominator square root of 263 minus begin display style left parenthesis 37 right parenthesis squared over 6 end style end root square root of 1049 minus begin display style left parenthesis 74 right parenthesis squared over 6 end style end root end fraction

xi

yi

xiyi

x2

y2

3

6

18

9

36

4

8

32

16

64

5

10

50

25

100

7

14

98

49

196

8

16

128

64

256

10

20

200

100

400

Answered by Renu Varma | 22 Dec, 2022, 14:11: PM
JEE main - Maths
Asked by jaishreepatidar2 |
ANSWERED BY EXPERT ANSWERED BY EXPERT
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