parametric test

  1. S

    Need help in deciding whether to use parametric test or non parametric test ?

    I am working on an assignment. I have sample study of 9 participants suffering from a mental disorder and the participants mood scores are being measured at three time points after subjecting these participants to a new intervention.The mood scores are normally distributed. Should I run a...
  2. D

    Parametric vs nonparametric tests

    I'm pretty confused about the conditions in which I should use a parametric or a nonparametric test to compare the means of 2 (or more) populations and would be very grateful if someone would explain it to me. I know that if the distribution of the sample is not normal, non-parametric...
  3. M

    Parametric or non-parametric test?

    Dear all, I’m not fluent in statistical data analysis and I can’t afford the services of a professional. Please I really need your suggestions with the following: The first column of my table represents the different sampling sites from which I obtained different parts of a plant species...
  4. S

    Justify the use of parametric tests on non normally distributed data

    Hello there. I have 5 Likert scale questionnaires that have been answered by the same people who have been randomly selected (N=24) and i have the following problem: I first test the data distribution of each scale in order to determine what statistical analysis tests should i employ...
  5. K

    SPSS - Kolomogorov-Smirnov Test

    I am a masters student and I am trying to assess which tests to use. I am checking for normal distribution. I have conducted a Kolomogorov-Smirnov test by going into descriptives>explore>plots>check for normality. I was given a value for 0.000. However I also conducted a Kolomogorov-Smirnov...
  6. V

    statistics 101-statistical tests help!

    Hi. I'm really sorry if this question is in the wrong place. I'm trying to figure out and justify statistical tests to be used for a research proposal - don't have to do the tests just explain and justify my selection. I am comparing 2 groups. group a has 1 days training and group b has 5...
  7. A

    Distribution of a subset of the complete sample

    Dear all, My question can be easily misunderstood, so please allow me to briefly explain the experimental conditions. I have measured a variable from 120 individuals in total, 60 of one genotype and 60 of another. The distribution of the complete sample of each of the two genotypes is...