Linked Questions
38 questions linked to/from Do we need a global test before post hoc tests?
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What type of hypothesis test for multivariate testing (Website)
Situation:
A website I work on has the following funnel:
Home page (landing page) > pricing page > create account > convert (subscribe with credit card).
We ran a test on the pricing page. There were ...
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What is more powerful – an ANOVA test or post hoc tests?
From answers on this site I have learned that it is possible to get significant results from multiple comparison tests ("post hoc"), even if ANOVA did not yield a significant result. I ...
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Post hoc contrasts when only certain contrasts make sense
My experiment has a 2x2 design, full between-subjects, so that the resulting four groups are as follows:
-Group A-1: Experimental treatment A.
-Group A-2: Control for experimental treatment A.
-Group ...
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Correction for multiple comparisons
I have a 2x3x4 repeated measured anova. I have a significant 3-way interaction, and I want to make sure that I am using the correct post hoc comparisons and not violating any key statistics theory.
I ...
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lsmeans multiple comparisons and Fishers LSD
I am using the lsmeans package for "post hoc" multiple comparisons and I read here: ANOVA - Do we need a global test before post hoc tests? that in general post hoc ...
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How to report significance of factor levels shown in summary of glm?
The summary of my GLM shows day 12 of factor Date to be significant, but anova(model, test="Chisq") shows Date to be not significant overall. I know how to report the statistics from the Chisq table, ...
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Interpretation of discrepancy between prop.test and pairwise.prop.test results
My aim is to find out if infection state (pos / neg) is associated with the group of patients (A, B or C). For this analysis I have followed suggestion from How to analyze $ 2\times n$ contingency ...
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T- test for A, B, C, D
As you know, Student´s t-test is only valid for a pair of variable/experiment.
for instance, we can do t-test(A, B).
Now, I need to test whether variables A, B, C, D are close to each other or not. ...
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Conclusion on which groups differ without doing post-hoc test
If you do a statistical test that compares groups and find a significant difference between groups, can you then conclude that there is a difference between the "lowest" group and the "highest" group, ...
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Discrepancy between the results of the ANOVA and the post-hoc test: How should be such results interpreted and presented?
It is possible to find discrepancies between the results of ANOVA and post-hoc tests. The results of post-hoc tests are valid (with the exception of the Fisher LSD test) even if the overall P value ...
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qqplot result and normality for ANOVA
The independent variable is promotion, and it is assigned to 3 groups. The dependent variable is sales revenue. I have 172 observations of sales revenue for promotion group 1, 188 for group 2 and 188 ...
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Multiple testing adjustments in posthoc.quade.test
In R, posthoc.quade.test (package PMCMR) or quadeAllPairsTest (the new variant, PMCMRplus) are posthoc tests for Quade test and offer the option for adjustments (i.a. Holm, BH etc.).
In my previous ...
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Choosing the right test to compare the difference in mean between 3+groups according to the data we have (param vs non-param, sample size..) [closed]
I hope everyone who reads this is fine. I come to you for help, I am a student in data analysis, but I am not yet familiar with everything, especially regarding tests.
I have 3 groups of independent ...
user292504
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Factorial regression without significant interaction - can I consider contrasts significant?
First, I'm really sorry if this is a duplicate, I just couldn't find a definite answer.
I'm not used to analyzing categorical variables so I'm having trouble with something that is probably very basic....
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Difference between one-way ANOVA and all pairwise comparisons with Bonferroni correction [duplicate]
If you have five groups and you wish to know if there is a significant difference between any of the group means, you would have to do 10 pairwise comparisons to test all possible pairs of means. You ...
user46925