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  1. R

    Overlapping Samples T-test

    Hi, Could someone please tell me how to do an overlapping samples t-test? In my survey, respondents rate (0 to 10) any of 10 options that they're familiar with. So I want to compare the average ratings (significant difference or not) of the options to each other, keeping in mind that in each...
  2. R

    Factor & Discriminant Analysis

    From a large data set, I've created several groupings of individuals based on factor analysis. In the future, if I want to predict which group an individual fits into based on the same questions, should I use the factor loadings I have, or do a discriminant analysis (or logistic regression - the...
  3. R

    Significance of rankings of random choices

    I have 30 options of food (10 fruit, 10 vegetables, 10 meats), and ask respondents to rank (most favorite to least favorite) 4 randomly selected choices from those options, but always 1 meat, 1 veggie, and 2 fruits. How do I determine statistically significance differences of total most favorite...
  4. R

    Which sig test to use?

    I want to compare a change in 2 experimental groups to the change in 2 control groups. So I have results for one sample, then retested among another indepedent sample, and was tested among a control group, then retested among a different control. For example, the 1st experimental group had a...