non parametric

  1. F

    Best Nonparametric test for nominal and continuos variables

    Hello everybody. I'm looking for the best test to find an association between two variables: - a test score (continuous, ranging from 0 to 100); - a yes or no binary variable (like, for instance, being clever or not) Variables are not normally distributed and their relation is not...
  2. E

    memory study - parametric or non parametric test

    Hello there, I've conducted a memory study which aim is to evaluate the effect of the spatial position of a visual object (left upper, left lower, right upper and right lower quadrant of the screen- independent variable) on its chance to be correctly recalled in 2 memory tasks: the first is an...
  3. S

    Measuring variation with percent data

    I'm working on a project where I have about 300 geographic units and each unit has 11-5000 people. There are five guidelines and each person can be compliant or non-compliant for each guideline. I have calculated a percent compliance for each guideline for each geographic unit. For example...
  4. J

    Unequal group sizes and chi square test of independence

    I began working on a project that compares birth outcomes of women in a case management program (n = 270) to the birth outcomes of the general population of delivered mothers in the state (n = 56,001). We were critiqued for testing with chi square for group differences on several birth outcomes...
  5. A

    Parametric or non-parametric test ?

    Dear the members of group. I have 2 questions regarding my research which has 8 variables in which 6 of them are normally distributed and the rest are not normally distributed. 1. Do I need to use parametric test for those 6 variables and non parametric test for the rest of two variables to...
  6. M

    [non normal Multiple sample comparison] analysis and error bars for medians

    Dear all, Background: Treatment applied to 10 groups of different sizes. Each group treated with a different concentration. Groups 9 and 10 are control/sham and represent the negative outcome. Samples in each group are independent. Group numbers vary from 12 to 4 (I cannot increase the...
  7. F

    different test for normality

    Hi, Can anybody give a brief description for different non-parametric tests of distributions (like normality)? what are differences between Kolmogorov-Smirnov, Lilifor and Shapiro-Walk tests for normality?
  8. F

    Alternative nonparametric test for chi-square test for independence

    Hello, suppose we have a table like this: and we want to know if wining or loosing depends on sex (male or female) apart from chi-square test for Independence, which non-parametric tests we can use? Thanks
  9. M

    ANOVA or Kruskal Wallis

    Dear Stats experts here... I have a question: I am counting cells in histology slides of certain timepoints after a treatment. day 0, day 1, day 5, day 10, day 20, day 30, day 60, day 90 for each time points I have 3 histology slides of three independent individuals. each...
  10. G

    Test for symmetry? [Please]

    (This was posted in a different sub-section of the forum, but has remained unanswered for over a month. I'm posting it here in the hopes of getting a respondent.) I'm doing a psychophysical study on motion direction estimation and the direction-dependence of the estimation errors. My current...
  11. G

    Test for symmetry - comparing multiple pairs of distributions?

    Hi all, I'm doing a psychophysical study on motion direction estimation and the direction-dependence of the estimation errors. My current problem is determining whether the perceptual bias of a motion direction is symmetrical around a cardinal direction. So what I have are: multiple...
  12. S

    Kruskal Wallis test and problem with zeros

    Hi. I am conducting a biological research about species abundance variations between different hours and localitions. I am comparing 11 different locations and 5 different hours. Independent variables are hour and locality. Dependent variables are abundances of each species found in...
  13. A

    Nonparametric multiple linear regression with SPSS

    Is there a way to conduct nonparametric multiple regression analysis using SPSS? If yes, can you provide some explanations on this regard. I have three IVs and one DV with nonparametric data from a Likert scale. I trying to identify if I can use the IVs to predict the DV. Also, I want to...
  14. S


    Hello, I need help in choosing a non parametric test. I have a questionaire of closed answer questions in a 4 point likert scale that has applied in two moments pre and post a writing session, on 6 times. The questions are indicators for diferent dimensions. So i decided do sum the values...
  15. L

    Effect size for Wilcoxon Signed Rank

    1) i want to calculate the effect size for wilcoxon signed rank (paired sample). I have one group of 10 participants. I know the formula for the effect size is Z/squaroot of N. My question is, does N refer to the numbe of participant (N=10) or should I multiply the number of participant...
  16. R

    2-Way Factorial, Non-Parametric, Repeated Measures test.

    Hi I've got data from a 2x2 fully factorial, repeated measures design. The residuals are non-normal so I am looking for non-parametric equivalent of the 2-way repeated measures ANOVA. I know there isn't one available from the SPSS menus, but has anyone got any SPSS syntax that can perform this...