comparison

  1. X

    What test to use?

    Which statistical test would you use to analyze data from a quasi-experimental comparison Group Pre-test/Post-test? Subjects are nonrandomly assigned to the treatment and non-treatment groups. I tried searching online, and it appears that I have to use an ANCOVA? Since the statistical...
  2. D

    Combined t test for intercept and gradient - Unequal sample sizes, equal variance

    I work in an industry where sales are related to temperature. My colleague has performed two regressions for sales: Monday to Thursday sales= a1 + b1*Temp Friday sales = a2 + b2*Temp I'm trying to determine whether Friday Sales are the same as Monday to Thursday sales. By 'the same' I...
  3. D

    Comparing Measurements

    Hi everyone, Please could someone help me to find which is the best way to compare two measurements after changing the way of measure? Here is the scenario: I have one bench that executes RF Power measurements and I want to make these measurements in another bench. I just want to sure...