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Well you can tell just by the table that the association is positive..
ok so we can agree 6. is positive
I can guide you on finding the correlation, but I can't tell you the answer. What you want to do is find the mean (average) of x and y. Once you have your mean of your "x" values you will subtract the mean from every individual x-value that you have.. For example, if your x-values were 1 2 and 3, the average of those is 2, so you would do (1-2) (2-2) (3-2) etc..
ok I see, but I dont see what to caluucate
What do you mean? You calculate the numbers in your table..
I know but how do you know what to do them by?
hmm maybe its the operations
Well like I said earlier, find your average of x and then average of y.. your average of x is 1.83 your average of y is 2.86 Now you will subtract your average of x from every x-value.. (.3 - 1.83), (.85 - 1.83), (1.50 - 1.83), (2.50 - 1.83), (4.0 - 1.83) and solve those.. so then do the same for y..
(.8 - 2.86), (2 - 2.86), (2.5 - 2.86), (3 - 2.86), (6 - 2.86) and solve..
ok give me a second
Tell me what you get for the x values, then the y when you get them.
-1.53 , -0.98 , -0.33 , 0.67 , 2.17
-2.06 , -0.86 , -0.36 , 0.14 , 3.14
Alright, good. Now what you need to do next is multiply your x and y values with each other.. so -2.06(1.53)= ? -.86(-.98)=? -.36(-.33)=? .14(.67)=? 3.14(2.17)=?
you will also square your x and y's .. so.. -1.53 squared =? -.98 squared =? and so on, but like I said do it for x and y
-3.1518 , 0.8428 , 0.1188 , 0.0938 , 6.8138
Now add those up ^ and tell me the final sum of them. And that will be one step out of the way for a moment. (sorry I know it is a lot of work)
Alrightey. Now go ahead and square your x and y's and then add all the x's together then add all the y's together and tell me what you get.. (almost done!)
That's for x, correct?
8.42 isnt right
Let me grab my calculator and work out the x's and y's. Just go ahead and try the y's and I will check it. :P
I got 6.4294 for the x's..
i am getting undefiend for y and x
You may be entering them wrong.. I also solved the y's and got 4.7664 So let's just go on from there..
So now you have.. 4.7174 which is what you got from multiplying x(y) 's 6.4294 from squaring the x's & 4.7664 from squaring the y's What you will do next is add up all three of those numbers..
So tell me what you get when you add them.
@Howard-Wolowitz still there? c:
yes im just thinking about how to do it
Just add up 4.7174 + 6.4294 + 4.7664
When you add them up you get 15.9132
Yes.. One more step and you're pretty much done!
ok let me solve this
Yes, whatever you get from this answer will be your correlation :P
I got 2.8746 So, what you can conclude from this correlation, is since it is greater than one, it would be a strong positive correlation. :)
7. 2.8746 8. what you can conclude from this correlation, is since it is greater than one, it would be a strong positive correlation