Posted by **Anonymous** on Wednesday, September 26, 2012 at 8:01pm.

An insurance firms wants to examine the relationship between text messages per day and insurance claims. The following data is a sample of 5 participants:

Cellphone Texts per day (X) Insuance Claims ($$) (Y)

4 800

18 2600

12 2800

26 0

20 6000

Choose the correct Estimated Regression Equation.

- statistics -
**MathGuru**, Thursday, September 27, 2012 at 7:11pm
If you need to show the work by hand, you can develop the regression equation in the following format:

predicted y = a + bx

...where a represents the y-intercept and b the slope.

To get to that point, here are some formulas to calculate along the way.

To find a:

a = (Ey/n) - b(Ex/n)

Note: E here means to add up or to find the total.

To find b:

b = SSxy/SSxx

To find SSxy:

SSxy = Exy - [(Ex)(Ey)]/n

To find SSxx:

SSxx = Ex^2 - [(Ex)(Ex)]/n

I hope this will help get you started.

- statistics -
**os**, Friday, October 11, 2013 at 4:26pm
37

- statistics -
**Jennifer**, Monday, March 17, 2014 at 4:57pm
80%

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