Lady Manson (ladymanson) wrote,
Lady Manson

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Regression analysis - PLEASE HELP!!!

This is for school.  I have been working on it all week and cannot figure out the last part.  I'm working VERY hard to get an A on this assignement because it means the difference between an A and a B in the class, which could make or break my 4.0 GPA I have worked my ass on so hard in school.  It is for my Statistical Analysis class. 

I have a question regarding regression analysis.  I have the information needed, but I need to figure out how to determine which regression produces the strongest correlation coefficient result and why this is. When it comes to analysis, I am good at getting the information, but this part of it is very difficult for me. I have found that all the R-squared values and y-intercepts on my charts are the same, but the slopes are different, so I don't know if that is helpful or not. I am supposed to give specific reasons regarding any similarities or differences in the output results, but I don't know any specific reasons. I have been working on this all week and just cannot figure this part out. Can someone help? 

Chart info:

Chart One: R² = 0.1634, y intercept = .0462x + 4.419, slope = 0.273647058823529

Chart Two: R² = 0.1634, y intercept = 0.0462x + 4.419, slope = 0.0774117647058824

Chart Three: R² = 0.1634, y intercept = 0.0462x + 4.419, slope = 0.164235294117647

The R-squared value and y-intercepts were found in the charting options in Excel and the slope was found using the SLOPE function, if that makes a difference.

ANY help would be appreciated, thank you so much in advance!

Also a HUGE THANK YOU to everyone who commenting on my cancer scare posts!  I haven't had time to get back to everyone because this has been a CRAZY week workwise, but I appreciate it more than you know.  Having people backing me up in such a scary time made me feel so much better.  THANK YOU ALL!!!
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