power analysis

  1. J

    Determining sample size in a factorial repeated measures ANOVA using GPower

    Hi all Can anybody tell me which F-test option in G power is appropriate to find out the sample size for a 2x2x2 repeated measures ANOVA? The three within subjects factors are A, B & C. I am interested in finding out how many subjects I will require to find a main effect of A...
  2. C

    Power Analysis and Sample Size determination help!

    Hi all! I am new here so I hope my post is appropriate! I have searched the web and this forum and haven't been able to figure out how exactly I need to perform a power analysis for sample size determination (although I admit I didn't scroll through ALL of the results to my search on this...
  3. H

    Min sample size for Wilcoxon Rank Sum test

    Hi, I have data measurements (eg, running cost) that keep coming in to the system continuously. There are two groups (say X and Y) that I want to compare. I want to see which one is systematically larger (H1: X > Y?). However, I have a couple of issue with my data: i) I can't assume normality...
  4. M

    Statistical test and power

    Thank you for your help! I am having trouble understanding what statistical test I can use, in order to figure out a power analysis. I want to prove that an animal is capable of vocally matching a stimulus. So I have a pre-recording of the animals call, a artifical call played to the animal...
  5. B

    Need help with power analysis!

    Hi all, I need some help with conducting a power analysis for a 3 arm equivalence trial, with 2 treatment groups and 1 control group. Is there anyone who could let me know how this could be done? or guide me to relevant readings? Any input is much appreciated. Thanks Bumblebeeeee!
  6. R

    Help with power analysis!

    So, I've never taken a statistics course before. Just completed my honors thesis and graduated. Now I'm trying to do power analysis (post hoc) on my data. Using G power, please help me with what to do/how to interpret the results. First of all, I looked at two independent groups (group 1...
  7. F

    Power Analysis for Factorial ANOVA Design?

    Hello, I have the following experimental design: Dependent Variable: time taken for task Independent Variables: task difficulty(2), device configuration(5) Participants are randomly assigned to one task difficulty (easy or hard). They then go through all 5 device configurations (which...