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linear regression model :
y=ax+bto test the relationship we need to calculate the coefficient of correlation r
how to calculat r ?I guess this is more of a statistics question rather than business analysis.
Check out the following link;
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Yep, it is a statistic question but I remembered that the fomula was stated on text book as well.
Anw, you can check the formula on the following link:https://mathbits.com/mathbits/tisection/statistics2/correlation.htm
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