students t test

  1. G

    Student's T-test versus one-way ANOVA

    I need help on deciding which statistical test to report. This is not really a statistics problem per say, I've done the calculations already. My problem is I have limited experience with research and publishing and I am getting confusing advice on what to present for my results. I would...
  2. Z

    What happens to T-Crit & T-obt when means decrease or increase? Clues are welcome too

    I am having a very hard time with my Stat.Psych. homework regarding Student t Test for single sample, correlated and independent groups. I am not very good at statistical psychology although I do have a solid understanding of basic methods and definitions. However, this is a bit complicated for...
  3. N

    Application Specific: Strange behaviour of students T-test compared to std.dev plots

    Hello all, ******************************************************************** SEE THE FITH POST OF THIS THREAD TO GET A BETTER IDEA OF THE ISSUE ******************************************************************** I am comparing three datasets of length 7201 datapoints each (on images this is...
  4. K

    How many measurements needed to distingish between two outcomes?

    I have a historical dataset of about 500 measurements. Datapoints that turned out to indicate A or B, each have a distribution from which I computed mean and std. If I plot a histogram of these measurements, I have two semi-overlapping gaussian distributions. Those measurements that indicated A...
  5. B

    [Students T Test] - paired or unpaired unequal variance?

    Hi, i have a question as to whether a paired test in this instance is appropriate. Scenario: an experimenter is testing a new treatment to see if it increases a certain property of a substance. The experimenter chooses 4 groups of the substance and takes 3 sample from each group and tests for...