SOLUTION: Find the value for the correlation coefficient r. x = 5 , 1 y= 5 , 10

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Question 155341: Find the value for the correlation coefficient r.
x = 5 , 1
y= 5 , 10
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the value for the correlation coefficient r.
x = 5 , x= 1
y= 5 , y = 10
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There are at least two formulas for "r".
One of them is
r = [Summation(x-xbar)(y-ybar)]/(n-1)sxsy
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n=2
xbar = 3 ; ybar = 7.5
sx = 2.83 ; sy = 3.54
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r = [(5-3)(5-7.5) + (1-3)(10-7.5)]/ (2-1)*2.83*3.54
= [2*-2.5 + -2*2.5]/10 = -1
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Cheers,
Stan H.