non parametric

  1. J

    Is it appropriate to use Mann-Whitney U test for each of four outcomes when outcomes are mutually exclusive?

    I have an experiment in which we randomize primate subjects into high condition (n=9) and low condition (n=8) groups, and document each subject's behavioral response to 15 consecutive food exposure trials. Each subject's behavioral response during every trial is classified into one of four...
  2. D

    Can anybody help me choose a non parametric test? I have 3 samples of slightly different sizes (32, 33, 35)

    I am comparing disease risk scores (non normal data) within the range of antelope which changes during 1.Summer 2.Spring and 3.Winter (my 3 samples) The antelope are in different counties during each season. 32 counties in summer , 33 in spring and 35 in winter (My sample sizes) . Each county...
  3. K

    Wilcoxon Rank Sum Test Question

    2. Intermittent fasting (IF) consists of repetitive bouts of short-term fasting. It is of potential interest because it may provide a simple tool to improve insulin sensitivity in individuals with insulin resistance. (the latter increases the likelihood of type diabetes and heart disease). An...
  4. D

    Delphi assessment..., which tests?!

    Hi all, I've recently undertaking a Delphi workshop in an attempt to establish an expert opinion upon the importance of a series of behaviours to a specific species' welfare. I worked with two panels of experts independently, one 15 in number the other 4 (I know not ideal!)...
  5. 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...
  6. B

    Non parametric multivariate analysis. maybe :(

    Hello to everyone, i need some help with my statistical analysis. I have two different pharmacokinetic parameters. They result from two different models applied on the same data. These data are baseline and follow up data of 20 subjects. To sum up, for each subject, i have 4 measures: - two...
  7. D

    Significance test for 13 dichotomous DVs?

    I am studying unprofessional conduct. I have every case of misconduct over a 5-year period. I am curious if misconduct varies by education level. As you can see, misconduct is broken into 13 mutually exclusive categories, with a binary coding scheme. Theoretically, all 13 charges could exist...
  8. E

    Which Test To Use?

    Short version: 2-3 IVs (date, individual, compartment), repeated-measures(compartment), 20 DVs, non-parametric. Hello, I have 4 subjects that were tested 16 times. However, possible changes across time or individuals are not the subjects of the experiment, so would it be appropriate to...
  9. N

    Non parametric multivariate analysis?

    Hi this is a pretty straightforward question, what analysis allows multivariate analysis that is also non parametric? I would like to analyse the relationship between one response variable(continuous, non normal data) with 2 independent predictor variables(both categorical). So the anova...
  10. E

    Calculating likelihood for a particular biological sample. Is is possible?

    Hi you all! I've got a problem when trying to analyze some biological data in my PhD. Let's say that I'm interested in performing an analysis using observed values of a random variable (O), whose distribution is unknown, and their expected values (E) using a model like: Ei = k1 * exp ( - k2 ·...
  11. P

    Inaccuracy of Non-Parametric Bootstrap for great sample sizes in Excel-VBA

    My aim is to evaluate the performance of parametric and non-parametric Bootstrap under specific circumstances; and particularly their ability to capture the population mean within their produced confidence intervals -from now and on when talking about "coverage" I mean the ability of the...
  12. H

    Analysing count data? PLEASE HELP!

    I'm an MSc student and not particularly statically minded and I would really appreciate some help on going about analysing count data! Please try to keep is simple! I have two species, the common frog and marsh frog and I have count data on both species since 1980. The marsh frog is...
  13. M

    cross-tabs or non-parametric independent sample t-test

    I have conducted a survey to determine if there is a significant difference in the number farmers and non-farmers which agree to a specific farming policy. I have two variables. One variable identifies if the survey respondent is either a farmer or not. The other variable is binary and will...
  14. M

    Which test - most frequently observed species - chi-square, nonparametric or poisson?

    I work for a community group restoring beaches. We've done some preliminary investigation of the vegetation along a shoreline to compare against regional mapping. I have a basic knowledge of statistics but could use some help. 10x100m of shoreline have been sampled to determine dominant...
  15. J

    choosing the right statistical test for comparing data, when do you use which test

    Hello all, I would like some feedback on the right approach of analysing data, comparing means of groups of data. Currently I work with the following 5 steps to analyse my data. Is this approach correct or how do you analyse your data if you do it differently? 1) I test for normality...
  16. M

    Help finding appropriate test when observations are non-independent

    I have a data set consisting of data from 7 islands. I have measured the average gene flow between each pair of islands as well as the difference in temperature between each pair of islands. I want to know whether these to variables (average gene flow and "thermal mismatch" are correlated)...
  17. P

    I'm Confused Between Independent T-Test, Mann-Whitney And Chi Square Test?

    hello everyone, i need your help regarding these statistical tests since i'm not really big on stats. i want to know if there are any significant difference between the two groups in my study. i'm confused which statistical treatment i will be using. here's a little background on my study. i...
  18. G

    How can you prove normal distribution enough to use e.g. ANOVA not Kruskal Wallis?

    Hi everyone, I'm trying to produce an automated framework for choosing hypothesis tests and carrying them out. I really am new to statistics so sorry if I'm asking really obvious questions, but I've tried for so long to find an answer and aren't getting anywhere. This also isn't homework help...
  19. 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...
  20. 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...