clusters

  1. K

    multidimensional scaling (with clusters)

    I am writing my bachelor's thesis which was based on a study by Buma, Bakker and Oudejans (2014). Unfortunately I just realised that I misinterpreted the way the had done their analysis so I am back to square one, therefore your help will be most appreciated! I have 8 paricipants which...
  2. 8

    Measures of randomness

    Does anyone have any ideas on how to quantify randomness? More, specifically, I need a measure of clustering. Let's say I have 2 groups within a dataset. I plot their values based on two measures and color-code by group. When I do the same using other measures, I get a different scatter of red...
  3. T

    How to find Optimal Clusters in Hierarchical Clustering (SPSS)

    Hi I am a linguistics researcher and trying to use cluster analysis in SPSS. After reading some tutorials I have found that determining number of clusters using hierarchical method is best before going to K-means method, for example. Now I am trying to find out cut-off point in output table of...
  4. M

    Clustered Standard Errors vs. Multilevel Logit Model--Which one to use

    I'm working on a project with 233 observations from school districts in 10 states. Observations vary from between 3 and 108 observations per state. I am not interested in the state effects. I am only interested in the district level effects (the district level is Level 1-- there is no data on...
  5. C

    Clusters building from series of financial data

    Hi everyone, First of all I need to tell you that I don't know many things about statistics - I work in finance. Currently I need to "reverse-engineering" one of our projects. To put it clear, I have a series of data (26 members, products we sell, percentage) that represent the share in total...
  6. A

    Fitting log-linear models to survey data with cluster variance corrections.

    Dear folks-- This is not exactly a psych question, but I thought this was the forum wher I would find the most knowledge about log-linear models. If i shold relocate the question, please let me know. If you have catagorical count data from a large survey, with reported varience estimates fo...
  7. K

    Interpretation of low, negative, cubic clustering criterion values

    Hello all, My question is how do you use the cubic clustering criterion to assist in selecting an appropriate number of clusters when the values are all negative? I know that when they are positive you look for peaks in the values to indicate a demarcation point. However, when they are...
  8. S

    Time series or just repeated measures?

    Hi All, I have data on 7 clusters (ie, sites). The date are monthly counts (there is no zero inflation in most of the outcomes of interest...most clusters have a count in the 10s-100s for each month) , from Jan 2004 to May 2010, however only one cluster has data before March 2006. By...