b1= r * (Sy/Sx)

How do I get the number for r (correlation) given the averages of X and Y and their standard deviations?

Question

b1= r * (Sy/Sx)

How do I get the number for r (correlation) given the averages of X and Y and their standard deviations?

anonymous · Answer

@asnaseer 
@bahrom7893 
@iHelp 
@jim_thompson5910 
@karatechopper

anonymous · Answer

Statistics? fun. 
$$r = sxy/((sx)(sy))$$
where sx and sy are you standard devaitions and sxy is:

anonymous · Answer

Which is the average of your means.

anonymous · Answer

im still a little confused. can you tell me how they got b1 based on the data presented?

anonymous · Answer

attachment

anonymous · Answer

@.Sam. 
@eyust707 
@satellite73

anonymous · Answer

missing a lot of the page

anonymous · Answer

$$S_{xy}=\frac{1}{n-1}\sum_{i=1}^n(x_1-\overline{x})(y_1-\overline{y})$$ i can understand, we just need these numbers

anonymous · Answer

well then ill upload it as an excel file rather than a PDF because PDF gets choppy

anonymous · Answer

attachment