fisher exact test

  1. O

    Binomial tests

    Hi all, My colleague and I were arguing what statistical test is most appropriate to use in this simple situation: We are in debate whether a Fisher exact test or multiple Chi-squared tests are more appropriate to see if Group 3 has significantly fewer married people than the other groups...
  2. N

    Is Chi square test and binary logistic regression are not reliable due to small expected number?

    I received a critic from a reviewer stating that the the Chi-square test for some variables is not reliable due to either small expected number in the cells or due to some cell have zero and they should not be entered into binary logistic regression model. And the results obtained from the final...
  3. A

    Are the sum values 'No' and 'Not informed' in the Odds Ratio analysis correct? See the example.

    In a hypothetical study I am trying to assess whether the presence of allergy is a risk factor for the presence of any virus. For this purpose, a questionnaire was applied on which many individuals marked "yes" or "no" for the presence of allergy. Those who did not complete the questionnaire...
  4. C

    Which test in Spss is appropriate for my case

    In my questionnaire I had the 5 scale likert type question “How whould you evaluate new technologies?” (1: entirely negative, 2: relatively negative, 3: neutral, 4: relatively positive, 5: entirely positive). My sample was 400 people (selected with a non-probability procedure) of which none...
  5. J

    [SPSS - post hoc analysis and Logistic regression] When the result don't line up

    I'm a medical student doing his research interneship. We're currently investigating if there's a link between motoric and mental outcome and MRI imaging done on neonates. Im wondering if the post-hoc analysis I did in SPSS was the right way to do it. When inserting the data in SPSS, I...
  6. M

    Calculate percentages to be able to apply Fisher's exact test

    I have a 2x2 contingency table, but the total sample size is too large to be able to directly apply Fisher's exact test (as it involves factorials, so I'll obtain NaN or infinity). I know I could use chi.square instead, but I wanted to provide Fisher's exact test results. Could it be...
  7. F

    Question how to build the contingency table

    Hi all, I have two lists of genes as follows: DEList has 282 gene names AllList has 32805 gene names DEList is a subset of AllList. In both lists I've looked for genes which have a specific parameter (e.g. binding site for pol3 and binding site for pol2). The results of this...
  8. B

    Question about Chi Square and Fisher Exact Tests

    Hi, I'm very much working in stats by necessity, so much of my knowledge is coming somewhat on the fly. I had a question about two non-parametric tests and I wanted to see if I could get some feedback here.... In my field researchers are suggesting the use of Fisher exact test over chi...
  9. M

    Multiple comparison problem (one-to-many)-Protein sequence

    Dear All, I am new here and this is my first post. I have a problem where I am comparing a set of 9 protein amino acid (AA) sequences (Proteins I am interested in) vs 1000 random of proteins sequence sets 9 by 9. Basically, I am trying to confirm that some AA (e.g. Alanine) are enriched in my...
  10. E

    Why use Chi-square?

    Hi, I am putting together a statistics course about inference techniques to use when the predictor variable(s) are categorical (by which I mean, cannot be put into any meaningful order). I am including both Fisher's exact test for nxm tables (we are using R, which does this) and the Chi...
  11. G

    Fisher's exact test as a goodness of fit test

    Hello everybody, I'm at a beginner level regarding statistics knowledge and I would very much appreciate any help with this problem. I have a 10000x2 table (see below, first column is actually the index) where the first column holds binned data representing observations, dataset A, and the...
  12. B

    cross over trial

    Good day I would like some imput on what whould be the most appropriate test to do in this case: I have a cross over trial in which two products administered to an animal is deemed accepted (retains the product in mouth) or refused (animal drops the product out of mouth). Half of the...
  13. A

    Is Chi Square the right test to use?

    Dear all, I am having a bit of trouble figuring out which test to perform in the following case: In my eye-tracking study participants are viewing short video clips of people's faces and I count the number of times each of five face regions are fixated by each participant. I have one...
  14. P

    proc freq: how to calculate fisher exact test with non-integers

    Background: For my bivariate analysis, I am trying to perform the Fisher's exact test where the expected cell frequency is less than 5 (using proc FREQ). In one of my datasets I have to use a weight statement (in order to analyze a representative value of cases reported per county based on the...