Statistics Help @ Talk Stats Forum - Regression Analysis
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Linear regression, linear models, nonlinear regressionenSun, 22 Oct 2017 18:45:53 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Regression Analysis
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<![CDATA[Linear regression with only these data σx/σy =1.2]]>
http://www.talkstats.com/showthread.php/70457-Linear-regression-with-only-these-data-σx-σy-1.2?goto=newpost
Sun, 22 Oct 2017 16:02:31 GMTI have to demonstrate a linear relation between two variables X and Y using these data: σx/σy = 1.2. :mad: Small size effect required.

Test statistic tα = (b-β)/SE(b)

Can anyone help me, please?
]]>Regression AnalysisangbeeMultiple regression multigroup analysis in Amos
http://www.talkstats.com/showthread.php/70451-Multiple-regression-multigroup-analysis-in-Amos?goto=newpost
Sat, 21 Oct 2017 23:25:11 GMT B between two groups. The results of the standardised path coefficients (SPC) are...]]>I am testing the hypothesised effect in a model using SEM A -> B between two groups. The results of the standardised path coefficients (SPC) are Group 1: spc = 0.334 p < 0.001;
Group 2: spc = 0.316 p = 0.181. I would have expected the effect of group 2 to be also significant although it is worth noting that there are differences in the group sizes (group 1 = 72 group 2= 189). Is this an issue caused by the difference in the group sizes?
]]>Regression AnalysisHansihttp://www.talkstats.com/showthread.php/70451-Multiple-regression-multigroup-analysis-in-Amosprecision assessment of an experimental method
http://www.talkstats.com/showthread.php/70448-precision-assessment-of-an-experimental-method?goto=newpost
Sat, 21 Oct 2017 21:38:48 GMTHi everyone,
I have a very basic knowledge of statistics so apologies if the question is not formulated in appropriate terms. I really hope to get...Hi everyone,

I have a very basic knowledge of statistics so apologies if the question is not formulated in appropriate terms. I really hope to get some help from you on this.

I have data comprising a response variable and three predictor variables (a,b,c). I would like to assess the precision of the testing method in a statistical way.
I am thinking of extracting from the data specimens with a constant var a and var b (c not constant) and based on this extracted data I could assess if coeff of variation for the response variable is similar to coeff of variation for var c. If the CoVs were similar I could say my test method gives precise results.

Are there any other ways of approaching it in a more statistical way? Could I somehow use ANOVA to assess it instead?

Any help much appreciated!

Thank you,
Hanna
]]>Regression AnalysisHannaMahttp://www.talkstats.com/showthread.php/70448-precision-assessment-of-an-experimental-method