Recent content by gianmarco

  1. gianmarco

    simple count - type of data

    In my opinion, you have two categorical variables: words recalled (with 50 levels, 1 for each word) and condition type (with 2 levels). Besides understanding what type of data you are dealing with, it would help knowing your research question or analytical goal. Best Gm
  2. gianmarco

    am i approximately chi-squared?

    I missed the nonsense a lot
  3. gianmarco

    Which is Your Favorite Free Statistical Analysis Software?

    As for JMP, I edited my earlier post.
  4. gianmarco

    Which is Your Favorite Free Statistical Analysis Software?

    My 2 cents: PAST is used in different research fields and is tailored particularly for palaeontology. Lots of modules; very good graph facilities. Used by scientists world-wide. Worth keeping on your computer. JAMOVI: an free and open source alternative to the more cumbersome SPSS. Modules can...
  5. gianmarco

    Multiple regression of categorical variables

    Just to give you an idea of a use of LR, you may want to have a look at the following article: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0192039 Besides the specific field on inquiry, you may find some info about LR and examples of the interpretation of the results. I...
  6. gianmarco

    Multiple regression of categorical variables

    I think you should look into Logistic Regression, if your dependent variable is categorical. The independent variables (predictors) can be either continous or categorical, or both. But consider that there are some rules of thumb when it comes to the number of predictors vis-a-vis the number of...
  7. gianmarco

    Measuring data homogeneity

    Hello, in my earlier field of study (archaeology/anthropology), researchers dealing with pottery production were "measuring" standardization of pottery shapes using the Coefficient of Variation of certain vessels' measurements. Your idea of using the Standard Deviation would seem ok at face...
  8. gianmarco

    Long to wide format... how is it again?

    At least, you are like that sometimes....I am like that most of the time!!!!
  9. gianmarco

    Clustering univariate measures

    Hello, once I read an interesting chapter: Arroyo, J., Maté, C., & Roque, A.M. (2006). Hierarchical Clustering for Boxplot Variables. Data Science and Classification. The authors were suggesting to use the "ingredients" of a boxplot (quartiles, median, etc) to calculate a sort of manhattan...
  10. gianmarco

    How to compare the ranking of six items to a correct ranking for each participant.

    Not to be defensive, but calculating absolute differences is not that unknown in data analysis. The mean (and median) absolute deviation is a robust "substitute" for the standard deviation. Also, Manhattan Distance rests on pair-wise absolute differences. So, if your goal is coming up with a...
  11. gianmarco

    How to compare the ranking of six items to a correct ranking for each participant.

    Just a quick suggestion, maybe some one can provide a sounder help. To come up with a value that may express how close is each participant to the "correct" ranking, you might calculate the absolute difference between the rank assigned by each participant and the corresponding "correct" rank...
  12. gianmarco

    HELP. "Comment on the appearance of the plot"

    SPSS which drives me mad !!
  13. gianmarco

    Determination of optimal number of clusters (stpping rule) with similarity measure (Jaccard coefficient)

    Hello, It's a while that I do not deal with cluster analysis, so please take y words with a grain of salt. As far as I recall, there is a large literature on the way in which one should decide where to "cut the tree" and, consequently, to decide how many clusters can be read off the dendrogram...
  14. gianmarco

    A basic question about chi-square test

    It would seem that the online calculator can only handle 2x2 tables (2 rows x 2 cols). This for example can handle larger tables: https://www.icalcu.com/stat/chisqtest.html
  15. gianmarco

    A basic question about chi-square test

    It would seem that the online calculator can only handle 2x2 tables (2 rows x 2 cols).