parametric

  1. J

    Some help needed in analyzing Likert-type data (using Repeated Measures ANOVA?)

    First of all hello to everyone, since I'm new to this forums. I'm afraid statistics is not my strongpoint (to put it mildly), and thus apologize that I have to ask your help on what I fear is quite a 'beginner-level' type of question. Any help you can give me is greatly appreciated though...
  2. I

    Comparison of the power of the tests: Parametric test versus Non-parametric test

    How can one compare using a simple experimentation or simulation whether a parametric test (e.g. t-test) is more powerful than its non-parametric counterpart (Wilcoxon signed rank test)? I understand that statistical power is defined as the probability of rejecting the null hypothesis when it...
  3. O

    Parametric test results vs Non-parametric test results - interpretation help please?

    :wave: Hello, thank you so much for your help. I am currently working on an article about trends in streamflow in watersheds with different land use change over time. For this I need to analyze trends in streamflow parameters over time. Both non-parametric and parametric tests were applied...
  4. C

    Using variations of ANCOVA for non-normal distributions

    My first question here, hope to be relevant to the community. Im into CS course and a total rookie on statistics, so let me know if more detail is needed and I will edit the post. I have a problem now that we want to compare sample groups and wanted to come up with a function out of it, so we...
  5. S

    Parametric or non-parametric for 2 sets of data being compared one normal one not

    Hi folks, I am in a dilemma and maybe one of you can help. I have 2 sets of data, one from a control group and one from an experiment group. Each group took a test before and after a period of time and difference calculated. When checking for normality within the data via Anderson-Darling I...
  6. M

    Parametric vs. non-parametric test.

    Dear all, group 1: treatment A group 2: treatment B thickness of the skin was compared between group 1 (n=20) and group 2 (n=20) I have used a non-parametric Mann-Whitney test resulting in a highly significant difference. Now, the reviewer of my paper has rejected the submission...
  7. J

    Confusion on what level should data follow normality

    Hi everyone. I'm experiencing some confusion as to what level the data should be normal. For instance, in an unpaired data set, where some vitamin is the main factor (given or not given) applied to a population of mice, you are interested if their blood sugar level is differing between the...