Math, asked by kaursimranjeet00187, 1 month ago

4. Calculate the coefficient of correlation from the following data:
N =10,X = 55.7 = 4,8X2 = 385.LY? =192.2(X+Y)2 =947​

Answers

Answered by pathanayan57305
1

Answer:

Correct option is

B

−0.68

n=10,

∑x=55,

∑x

2

=385,

∑(x+y)

2

=947 ∑y=40,

∑y

2

=192,

∑(x

2

+y

2

+2xy)=947

(∑x

2

+∑y

2

+2∑xy)=947

385+192+2∑xy)=947

∑xy=185

r=

(n∑x

2

−∑x

2

)(n∑y

2

−∑y

2

)

n∑xy−(∑x×∑y)

=

(10×385−55

2

)(10×192−40

2

)

10×185−55×40

=−0.68

Step-by-step explanation:

I I wish this is my correct answer

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