Search found 285 matches

by reason180
Mon May 20, 2024 1:56 pm
Forum: Statistics
Topic: Logistic regression analysis for two treatment groups and two time points?
Replies: 12
Views: 585

Re: Logistic regression analysis for two treatment groups and two time points?

Sounds like you need to include A vs B as a factor, *and* you need to examine the interactions of that factor with other predictors.
by reason180
Sat May 18, 2024 10:12 pm
Forum: Statistics
Topic: Logistic regression analysis for two treatment groups and two time points?
Replies: 12
Views: 585

Re: Logistic regression analysis for two treatment groups and two time points?

If you're not interested in comparing treatment group A to treatment group B (and if you think your audience won't be interested in that comparison either), then you could simply code the data so that there's no distinction between A and B, and do just one analysis. (Doing two separate analysis halv...
by reason180
Mon May 06, 2024 9:06 pm
Forum: Help
Topic: Post hoc tests in Walrus (Robust ANOVA)
Replies: 6
Views: 4331

Re: Post hoc tests in Walrus (Robust ANOVA)

Oh. OK. So it looks like the other value of supp (i.e., "VC") is excluded completely from the interaction post-hoc test. So probably best to just remove the "interaction" post-hoc test table since, for whatever reason, it doesn't actually work right.
by reason180
Mon May 06, 2024 2:45 pm
Forum: Help
Topic: Post hoc tests in Walrus (Robust ANOVA)
Replies: 6
Views: 4331

Re: Post hoc tests in Walrus (Robust ANOVA)

I would also have doubts. For example, in a Walrus (bootstrap) robust ANOVA on the Tooth Growth Data, I think there should be 15 post-hoc comparison. But the output produces only 3.
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by reason180
Wed May 01, 2024 2:34 pm
Forum: General
Topic: Reorder output
Replies: 15
Views: 29988

Re: Reorder output

I found a non-technical work-around: I simply include a 'table of contents' telling the reader wear to look in the numbered-but-out-of-order analyses. For example . . . RESULTS Contents Response Time General Descriptives for RT (#5) ANOVA of RT (#3) Rj planned comparisons for ANOVA of RT (#6) Accura...
by reason180
Thu Apr 25, 2024 4:09 pm
Forum: Statistics
Topic: Independant Samples t-Test: Assumption Checks?
Replies: 3
Views: 995

Re: Independant Samples t-Test: Assumption Checks?

I believe it's the residuals for the entire model that need no be normally distributed. https://statistics.laerd.com/statistical-guides/independent-t-test-statistical-guide.php#:~:text=Assumption%20of%20normality%20of%20the,give%20you%20the%20same%20result. Also, since the Shapiro-Wilk test is a sig...
by reason180
Wed Apr 24, 2024 1:16 pm
Forum: General
Topic: seolmatrix
Replies: 5
Views: 973

Re: seolmatrix

What I've found is that many institutional computers have app blockers that may allow core aspects of jamovi to run while blocking other aspects. I've found that this blocking is especially likely to affect modules. Moreover, I've found seolmatrix to be more affected than any other jamovi module I u...
by reason180
Thu Apr 18, 2024 12:31 pm
Forum: Statistics
Topic: Contigency tables
Replies: 6
Views: 1013

Re: Contigency tables

Oh. Sorry. However, I think those comparative measures are only computable in situation where the analysis can be conceptualized as comparing two things (to proportions, two ratios, etc.). Thus, they only work for 2 by 2 tables: https://cran.r-project.org/web/packages/chisquare/chisquare.pdf I've se...