post hoc

  1. S

    Multiple ANCOVAs: Post hoc Bonferroni, FDR, or can I use MANCOVA?

    Hi, I am comparing a protein level in multiple (40 to 4000 depending on the analysis) brain areas across three diagnostic groups, with a couple of covariates. I am using ANCOVA to compare the three groups. What is the best way to account for multiple comparisons? Where I am conducting large...
  2. A

    Chi-square post-hoc test - Helpless

    I have been looking around on the net looking for the best way to do a post-hoc analysis for multi factor significant chi-square test, with no success. I have a data-set of patients with different disease subtypes (Lung cancer subtype A-H). So my two main variables are - Ethnicity (12 levels) -...
  3. D

    Multiple A/B test in R: methodology and any know tutorial

    Dear All I'm currently facing the following situation. We have run a marketing campaign providing to some members one of two type of coupones. In addition to this, some of these members were already contacted in the previous one by another campaign. So I have the following dataset, where...
  4. U

    How do i analyse interaction in 3x2 ANOVA in SPSS

    Hi, i've discovered a significant interaction in my 3x2 ANOVA in my psychology dissertation (3x2 Between Subjects Design, using SPSS). I was wondering which post-hoc analysis i should use to study this interaction. My tutor has provided us with example instructions, which involve splitting the...
  5. R

    Power Analysis

    Hi there, I am currently writing a statistics report which has to cover 2 questions: Firstly, what the correlation is between two different test scores of 30 participants. Secondly, what the power of the study is. I am really struggling to grasp what the pro's of doing a post-hoc power...
  6. M

    post-hoc interaction following lme with both categorical and continuous factors.

    Hello, I'm relatively new to R and have run into some problems. Hoping someone can help! I'm using lme on a model with several, both within/between, categorical/continuous and fixed/random effects. I have 1 x fixed 2-level categorical between-subjects variable "group" (dose vs. placebo), 1...
  7. V

    Errors Using Selected Cases Filter for ANOVA + Post Hoc

    Hello guys, I'm a freshman here, but i need a help. I need to run a ANOVA + Post Hoc test using filters by "select cases" tool but it's not working I already used the 6 generated filters trying an ANOVA as fixed factors and with one dependent variabble "Price", but the errors are...
  8. S

    post hoc for dependent comparisons

    Hello, I have got 7 subjects. We measured their blood pressure at 3 time points before taking a drug, during effect and later on. I carried out a 1-way repeated-measures Anova, tested sphericity, but I do not understand which post hoc test I can carry out. Just paired t-tests reducing my alpha...
  9. F

    Are they misunderstanding ANOVAs here?

    Hi, Here's an extract from a paper I'm using in a systematic review: The mean GAD-7 score of the sample prior to the course was 10.98 (SD 5.17, range 0–21). The mean GAD-7 score after the online mindfulness course was 5.45 (SD 3.77, range 0–19) and at 1 month follow-up 4.60 (SD 3.72, range...
  10. M

    GLM with non-parametric post hoc testing?

    Hi guys, I have a question regarding the appropriate use of comparisons for independent samples (3 factor levels), please. Overall sample size is N=546, subsamples: 218 or 228 or 100), convenience sampling, stratified. I use ANOVA with post hoc Tukey, if Levene indicates variance...
  11. H

    Kruskal-Wallis = significant but post-hoc doesn't show any sig results...

    Hi everybody, really hoping somebody can tell me if I'm missing something obvious here. I've run a Kruskal-Wallis test on SPSS using the Analyze-Nonparametric-Independent Samples route and the Hypothesis Test Summary box tells me to reject the null hypothesis (sig=.003). However when I double...
  12. M

    repeated measures factorial ANOVA post hoc test

    Currently I am working on a way to distinguish Delirious patients from patients who still suffer from anesthesia and controls. I use the EEG and calculate relative powers in four frequency bands (Delta, Theta, Alpha and Beta) in three different regions (Anterior, Central and Posterior) of the...
  13. 3

    REGW Post Hoc in R

    Hi Everyone, I've looked and am surprised to be unable to find a way already created to compute the REGW post hoc anlaysis in R. Does anyone know of a package that has it? Thanks!
  14. C

    One Way ANOVA - Dummy Variable and Post-Hoc Questions

    Hi Everyone! I am conducting a retrospective research study to determine if a new specific sign of an injury is correlated with more related injuries to the region than two other signs. Patients have been sorted into one of three groups (one independent variable): Group 1: Cluster of signs...
  15. K

    Tamhane's T2 verses Dunnett's C and T3 Post Hoc test

    I have been working really hard to find the answer to this question, but the statistical references I have read all say they won't go into detail about these techniques. They give a citation, but I don't have access to it. I have asked the statistics professor in my department, but he doesn't...
  16. R

    Simple 4 group comparison of means problem

    I'll start by saying that I'm a neuroscience PhD student and have searched a long time for a solution to this problem but I can't find one. If you just have time to give a rough idea or point in the right direction then I'm grateful for any help. I am measuring the frequency of the same...
  17. A

    Repeated measures ANOVA : problem with interpretation

    My repeted factor represents an effect of an antipsychotic drug on some quantitative variable measured in 5 time points. When that is the only factor in the analysis I have significant differences between time points. I have included gender, age, drug doze and years of treatment in the model...