Recent content by mgzx

  1. M

    Fisher's exact test - two-tailed

    Hi guys, I performed a fisher's exact test on Genstat and got this result: One-tailed significance level 0.563 Mid-P value 0.371 Two-tailed significance level Two times one-tailed significance level 1.126 Mid-P value 0.741 Sum of all outcomes with Prob<=Observed 1.000 Mid-P value...
  2. M

    Help with statistical power?

    Hi, I'm doing a study looking at the ability of a test to detect a change in bacterial numbers pre- versus post-treatment [i.e. not treatment effect, but pilot study looking at efficacy of the test used]. I've done a chi-square test and got a significant result (p<0.05). However given that I...