comparing groups

  1. H

    Identifying correct statistical test for comparison of two groups related to time

    Hi, I'm conducting research into woodlice grouping behaviour. I have tested three conditions that are full darkness, full light, and a half-dark, half-light group with each having a total of three replicates. For the full darkness and full light conditions, I measured the frequency of...
  2. G

    Difference between categories and sample

    Hi, I've completed some research and categorised participants into 1 of 5 groups (independent variable), and then extracted a maximum data point for each participant (relating to driving speed) between 2 different scenarios - the data is NOT normally distributed and all participants completed...
  3. I

    Comparing two samples

    Hello, I'm working on a paper on Social media usage among university professors, and I'm comparing between two major networks (Facebook, Twitter), Not sure which test should I use, here is waht the data should look like this: ---------------------------------------------------------------------...
  4. K

    Comparing Groups 2 sample T-test or Anova

    So I have a word problem that I can't get my head around. Perhaps because the wording of the question is leading me down the wrong path about the variables. Any help would be greatly appreciated. So we have two variables (dissolved oxygen and levels of chemical waste) both quantitative. So...
  5. T

    comparing groups and the significance of two outcomes in each group

    Hi, It's been 10 years since I picked up a stats book and wondering what's the best tool for the job. Given 2 systems, 3 categories in each system (better, same, worse) and for each category two outcomes (a win or loss). Is there a statistical significance of a win or loss between the 3...
  6. X

    •Comparing groups - which test should I use(t-test or ANOVA)

    The general infomation is: We have 6 kinds of material and have 4 group for each material now(please see the attached table) we cut one tooth to two halves(A and B) and bonded two composite cylinder to each half(cylinder 1 and 2). half A is control group(just following the normal bonding...