Statistical XY file

Year; money spent on advertising; profit (three values each row)

2008 2 12
2009 5 20
2010 7 25
2011 11 26
2012 15 40

1. draw a scatter diagram depicting the data.
2. calculate the Pearson's correlation coefficient.
3. determine the linear regression equation.

Result

P =  0.9627
c = (Correct answer is: 1.9327x+9.1385)

Solution:

$P=0.96265074392828=0.9627$

$$\begin{gathered} y=f(x)=A_x+B \\ c=1.9327x+9.1385 \end{gathered}$$

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Showing 1 comment:

Mathematican

For linear regression we use this calculator:

https://www.hackmath.net/en/calculator/linear-regression?input=2+12%0D%0A5+20%0D%0A7+25%0D%0A11+26%0D%0A15+40

4 months ago  Like

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