anova observations

  1. B

    Anova with data reduction? (Experimental design)

    Hi, this is my first post, I hope to do nothing wrong like posting in the wrong area.:pag It happens that I did an experiment where I have a control group and an experimental one, I am comparing means with ANOVA, and I want to reduce the data by eliminating 5% of the lower and higher data...
  2. C

    ANOVA for three different time periods

    I have three different time periods of sales data of 4 weeks apiece: weeks 1-4, 5-8, and 9-12. During weeks, 9-12 we attempted a test that may have affected sales. Can I compare weeks 1-4, 5-8, and 9-12 with ANOVA to determine whether or not they have significantly different means? I...
  3. M

    Justification for running an ANOVA after receiving non significant results on MANOVA

    Hi I ran a MANOVA model, with 2 DV's (2 groups of adolescents) and 1 IV with 3 categories ("strategies"). I got a non significant result, with P. Value of 0.15 (for all categories). I know that if there is not an interaction effect one should stop at this point. However, the output (SPSS) also...
  4. M

    F statistic values more than 1000 (sample like 2000 and 5000 )

    I am studying the water parameters from three different groups. I performed ANOVA and found for few parameters F value was way high to report. I understand high value explains variance very well between groups. But can i report such values to scientific society. The parameters concerned...
  5. P

    1 observation for control group & 3 obs for experimental group

    Hello, My background in statistics is quite limited, so I'm searching for help in order to choose which test I should use for my research. I am comparing some formant values between two groups: native speakers (control) and L2 learners (experimental group). The participants of the...