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Mathematics 13 Online
OpenStudy (anonymous):

can i have help

OpenStudy (anonymous):

The graph below plots the values of y for different values of x:

OpenStudy (anonymous):

OpenStudy (anonymous):

Which correlation coefficient best matches the data plotted on the graph? (4 points)

OpenStudy (anonymous):

the answers: -0.5 0 0.25 0.90

OpenStudy (anonymous):

I think it is c. 0.25

OpenStudy (anonymous):

@sleepyjess

OpenStudy (sleepyjess):

ummmmm @danjs ?

OpenStudy (anonymous):

@DanJS

OpenStudy (sleepyjess):

or @dan815

OpenStudy (anonymous):

@dan815

OpenStudy (anonymous):

@DanJS @dan815 please help

OpenStudy (anonymous):

@Luigi0210

OpenStudy (dan815):

do u know the equation for the correlation coefficient

OpenStudy (anonymous):

no

OpenStudy (dan815):

google it and paste it here

OpenStudy (anonymous):

umm.. nothing comes up when i google it

OpenStudy (anonymous):

can someone help?

OpenStudy (mathmate):

|dw:1423443569951:dw| Here's a rough guide. r (correlation coefficient) >0 when the regression line has a positive slope. r < 0 when line has a negative slope. When the slope is indeterminate (cannot decide), r=0. r=1 or -1 when the line crosses all the points with no exception.

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