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    Independent Robust T-Test

    Sorry for the example above it would be DataExample$PT and DataExample$ClassPT. The Pre and Post measures are results before and after an academy. The PT variables are the differences between the two. Some people did not make it through the academy (left, were kicked out etc) so the difference...
  2. T

    Independent Robust T-Test

    Hi all, I'm attempting to compare differences between 2 unequal group sizes (one ~ 97 the other ~ 714). The reason for the large discrepancy is I am looking at a program done by one class to see if it is significantly different than what has occurred in previous classes. I've been reading about...