Question

Can anyone check my answers? I'll medal
Thanks

Answer 1

Second one i got B

Answer 2

@Michele_Laino

Answer 3

what is the "unexplained variation"?

Answer 4

I think that the first two options are right, for the third one, I need to know how is defined the "unexplined variation"

Answer 5

I dont know.. I jst know that for the firs tone you have to have 3 and I know that the first two are right

Answer 6

unexplained*

Answer 7

For number one B and C are right.... but i dont know if G is

Answer 8

please wait, I'm search for it, with google...

Answer 9

searching*

Answer 10

I found that "explained variation or variance" is like "correlation coefficient", whereas "unexplained variation" is the complementary part of "total variation" with respect to "explained variation", so I think you are right:
here is the link:
https://en.wikipedia.org/wiki/Explained_variation

Answer 11

for second question, you have to apply the right formula which expresses the correlation coefficient \(r\)

Answer 12

so for the second on im wrong

Answer 13

I don't know, I didn't make such computation

Answer 14

please wait, I go to check your result

Answer 15

here are first data:
\[\huge \bar x = 10.714,\quad \bar y = 163.714\]
please correct me, if I'm wrong

Answer 16

ok

Answer 17

i think your right

Answer 18

but then i am correct with B

Answer 19

please wait, I'm doing the computations...

Answer 20

ok no problem bro

Answer 21

I got this:

\(\huge r=0.9795\)

Answer 22

I think you are correct!

Answer 23

awesome

Answer 24

:)