samle size

  1. L

    Sample Size problem: Have done a trial/pilot, but how to proceed?

    I have a problem in calculating sample size. I did do a small pilot experiment, so this is some sample data with the same structure: df <- data.frame(ID = c(1,2,3,4,5,6,7,8,9), School = c("A","A","A","B","B","B","C","C","C"), Test_Method_A =...
  2. F

    small sample size

    Hi everyone! Nice to meet people do same things on the web:) Here the question: I have independent two group of patients first group have 10 patients second have 5 patients can I compare their surgical corrections (advancement measured as milimeters) with ManWhitney test? (since the...