Cyril Iaconelli

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Questions related from Cyril Iaconelli

ASA and p-values: towards the revelation of beta (eg. 1-beta = power of the test) values in future papers ?

Dear all,I'm sure that many of you noticed the recommandation of ASA about the use of p-values (http://www.amstat.org/newsroom/pressreleases/P-ValueStatement.pdf).It is now clear that p-value can...

11 March 2016 4,521 8 View

What e-value do you use as a cutoff (and for what purpose) when you are computing a BLAST?

Users mainly used the e-value as a cutoff to define a Blast "hit".However depending on what they do this cut-off change From 1e-2 to 1e-30 ! Is there a rule somewhere which defines the cut-off...

04 December 2014 2,835 4 View

Can a post-hoc test (tuckey LSD) fail to find a significant difference when a ANOVA does find a significant difference ?

I saw many times a significant observation after post-hoc test when ANOVA results showed no significant observation. I'm just interested by the opposite (see above), because it never happened to...

17 September 2014 691 14 View

What is necessary to write down when your are doing a Principal Component Analysis ?

I'm finalizing an article where I found useful to used PCA to shows interaction between variables. However I found several papers using that tool and as many version to communicate on PCA...

24 July 2014 6,438 4 View

Is it "fair" and feasible to rotate the graphics of Principal Component Analysis?

Imagine a PCA with only 2 variables (V1 and V2), the variables factor map show a 90° between this two variables but both of the are explained equally by the first and second axis. I would like to...

13 May 2014 8,160 5 View