1. E

    Question about Kolmogorov-Smirnov Test in R

    Hi all, I'm a bit confused about the way handles the Kolmogorov-Smirnov test for comparing two distributions. From what I know about the K-S test, the test statistic is the maximum difference between the CDFs of the two distributions (i.e., max|F(x) - F(y)|). In the data below, x is the CDF...
  2. R


    Hi, I have used a two sample kolmogorov-smirnov test to compare the distributions of two sets of data. I know that the K-S test is a non parametric test, however the distributions of data i'm comparing has turned out to be normally distributed... I know there is probably a number of tests...
  3. S

    Goodness-of-fit KS for multiple distributions

    Hi, I need to test the goodness of fit of various distributions using the Kolmogorov-Smirnov test. I am using SPSS for this (but also have matlab available). Doing this for a normal distribution wasnt a problem, however how can I perform and compare the goodness-of-fit for other distribution...
  4. C

    Normality tests and Shape statistics contradictory

    Hello. I am testing for normality on a number of repeated measures variables in a sample of 29 people. Both the Kolmogorov-Smirnov test and the Shapiro-Wilk test statistics say that all of these variables are significantly non-normal. However, observations of skew and kurtosis (as well as...
  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. P

    Significant and not significant depending on the test. What to trust?

    Hi. I'm a PhD student in the field of Bioengineering (sorry in advance for my poor english, btw). I'm analyzing some data to be included in a paper and have some concerns about what'd be the proper test for me to use. Basically, I'm studying the effect of increasing the concentration of a...
  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. R

    Transformation to improve normality

    Hi, I have a problem with some data that I am trying to analyse in a Repeated Measures design. I have 5 conditions (variables), 13 subjects, data points ranging from about -40.0 to +40.0 Both the Kolmogorov-Smirnov and Shapiro-Wilk tests are significant for some of the variables. Some of...
  9. C

    Case control, lot of parameters, N and n-Normal dist. Which test and data expression?

    Firstly, my english are not so good, sorry. I will be very happy if someone help me. I am doing a case-control study, people with and without schistosomiasis. How may I perform the Kolmogorov-Smirnov test, my groups must be together or not? I think that they must stay together. Then, I...
  10. K

    kolmogorov-smirnov + Liker = MANOVA

    I was told that if my likert scale data passes kolmogorov-smirnov then I can use MANOVA. That is cool, but I need a reference to this. Does anyone know of any books or papers that demonstrates/ supports this? I need this reference to complete my PhD thesis.
  11. L

    Two dimensional variant of Kolmogorov-Smirnov test and implementation

    Hello! I have to test two samples, which have two X and Y variables each, for being drawn from the same "pool". I found that there are the Peacock’s test, Fasano and Franceschini’s test, Cooke’s test and a ROOT’s version of the Kolmogorov-Smirnov test. The last one I read that it can be easily...