Question

55-y coefficient of x from these equations
​

Answer 1

Step-by-step explanation:

∑ny

=

10

586

=58.6,

N

∑y

=

10

55

=5.5,

N

∑y

=

10

88

=8.8

Cov(x,y)=

N

∑xy

−

N

∑x

N

∑y

=58.6−(5.5×8.8)=10.2

N

∑y

2

=

10

385

=38.5,,σ

2

y=

N

∑y

2

−(

N

∑y

)

2

=38.5−(8.8)

2

=38.94

bxy=

σ

2

y

Cov(x,y)

=

38.94

10.2

≈0.3