Statistics Help @ Talk Stats Forum - Regression Analysis
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Linear regression, linear models, nonlinear regressionenSun, 29 Mar 2015 15:42:25 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Regression Analysis
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p value of the constant, can I ignore it?
http://www.talkstats.com/showthread.php/60202-p-value-of-the-constant-can-I-ignore-it?goto=newpost
Sun, 29 Mar 2015 14:44:24 GMTI'm analysing the influence of various factors on hare harvests in a specific are.
E.g. How do the hare harvests change when the fox harvests increase.

Here the p value of the constant is highly significant.

But for other comparisons, such as the number of worker employed in agricultre (indicator for the level of mechanisation= the P value of the constant is very high:

Term | Coef | SE Coef | T-Value | P-Value
Constant | -12.4 | 71.0 | -0.17 | 0.868
Number of workers | 0.1220 | 0.0249 | 4.89 | 0.005

What does that mean? I somewhere red that my prediction around the origin is going to be inaccurate. Does this matter, and what does it mean for the relationship between the number of workers and the hare harvest?

I couldn't format the tables, sorry. hope you still get it.
]]>Regression Analysissumiehttp://www.talkstats.com/showthread.php/60202-p-value-of-the-constant-can-I-ignore-itConfidence for pooled within group slope
http://www.talkstats.com/showthread.php/60181-Confidence-for-pooled-within-group-slope?goto=newpost
Fri, 27 Mar 2015 16:13:28 GMTIn SPSS simple linear regression one can get the confidence limits either side of the linear regression slope simply by ticking the "prediction interval" box in SAVE. The upper and lower curvilinear bounds along the slope are then saved as columns with the original data.
I want the equivalent for the pooled within-group slope thats associated with ANCOVA in GLM univariate. Can anyone tell me how to get this? I also have BMDP but its not apparent to me how to get the info from this program either.
]]>Regression AnalysisStephen19http://www.talkstats.com/showthread.php/60181-Confidence-for-pooled-within-group-slope