two way anova

  1. S

    What Statistical Treatment can I use in this type of data?

    We are currently conducting a small study and have very small background in Statistical Analysis. We conducted some experiments and have gathered some data. Can anyone help me in identifying what type of Statistical Treatment we can use for this? The second column pertains to the number of...
  2. T

    Simple main effects - alpha correction

    Hi, I am hoping someone may be able to help me with this as I have found a lot of contradictory information online. I have a between-subjects 2(group: low vs. high) x 5(condition: c1, c2, c3, c4, c5) design. When running the ANOVA I find a significant group*condition interaction, so I therefore...
  3. N

    One way ANOVA or two way ANOVA? + non-parametric equivalents

    Hi, I am unsure about the choice of statistical test for my experiment design. I have four experimental groups, devided by two factors: disease (disease/healthy) and genotype (wild-type/knockout). Groups: wild-type & disease, wild-type & healthy, knockout & disease, knockout & healthy. I am...
  4. M

    Diff p-value when using 1wayANOVA and 2wayANOVA on same set of data

    I used the 2way ANOVA to compare 2 treatments (control vs. T1) across 4 groups (A-D). I used the 1way ANOVA to compare 3 treatments (control vs. T1 vs. T2) in group A - only group A had 3 treatments. But the results for the tests were different: the 2way ANOVA said there was no effect of T1...
  5. L

    Can I perfrom Two Way Anova? Also, is it possible to predict chemical percentage?

    Dear Fellow members, I have a data (attached the structure) and each data point is average of 30 observations. In this, I measure the chemical component effect to the 75 pound cement bag (0%-No chemical, 0.2%, 1.2% and 2.4%). I use four different methods to measure this effect (Breaking...
  6. R

    two way anova?

    Hello. I am hoping you may be able to help me understand why this is a two-way anova (it is possible it isn't) The assignment gives the following research question (1) Is there a significant difference in the walking behavior of students who were administered the HYPPE (exercise) program...
  7. K

    Order Effects- Conflicting results from two-way ANOVA and split file t tests!

    Hello, Whilst currently working on my dissertation I decided to check for order effects (I had of course used counterbalancing as part of the design). My experiment looked at the effect of motivational prime on categorisation and probabilistic reasoning. There were two groups and both groups...
  8. R

    Pearsons Correlation, Two-way ANOVA, Linear Regression Test, Chi-Square Test or None

    During research, you have asked your participants whether or not they have ever experienced financial difficulties (yes or no). You have three age-groups (16-20; 21-25; 26-30), and you predict that those in the 26-30 group have a greater risk of experiencing financial difficulties than those who...
  9. M

    Which t-test (complication)?

    Hi there, Im new here but any help would be greatly appreciated :) I have 48 lettuces which were judged by their weights (grown in separate pots). Half of these pots used normal soil, the other half a very sandy soil (which significantly reduced lettuce weights). Half of these pots...
  10. S

    Two way ANOVA for binary dependent variable

    I am trying to find the effect of two categorical variables on a dichotomous variable. I am resampling the values in a cell and each time getting a proportion out of it. So now the new values in my cell will be proportions from different samples and so they will be normally distributed ( I am...
  11. T

    2 way ANOVA with no interaction

    Hi, I have a data set with the following factors: Strain (1 depressive rat model, 2 control rat groups) and Region (8 brain regions) and receptor density (dependent variable). I have performed Two-way ANOVA with Bonferroni correction using GraphPad. I get a significant effect of Strain...
  12. C

    Post Hoc Difficulty: Cannot Conduct Tamhane's T2

    Hi, So I have just conducted my Two-Way ANOVA using my undergrad thesis data, and my Levene's Test came back with a significant result. According to my lecturer's notes, I'm to conduct a Tamhane's T2 as a Post Hoc, however I am not allowed to select this function in the Post Hoc tab (or any of...
  13. K

    Two-way non-parametric test with interactions?

    Hi I am trying to find the non-parametric equivalent of a two-way ANOVA (3x4 design) which is capable of including interactions. From my reading in Zar 1984 "Biostatistical analysis" this is possible using a method put forth in Scheirer, Ray, and Hare (1976), however, according to other posts...
  14. D

    Question on 2-way ANOVA stat use and interpretation

    Hi everyone! I am currently working on publishing an article from my Masters thesis. I had real trouble with the statistics section which was also pointed out by the markers. I was hoping to get some advice on how I could make this section clearer, concise, and overall of a better quality...
  15. S

    Two-way ANOVA to detect difference in activity at different temperatures?

    I need to answer the question of whether three species differ in their activity pattern according to soil temperature. Activity pattern is measured as the mean number of individuals observed in transects where each temperature was recorded and, hence, is not an integer. My data table looks...
  16. P

    What type of ANOVA/model to use for hypothesis test?

    I am trying to work out the most appropriate way to analyse some data from an experiment and would be really grateful for any ideas. The experiment involved getting people to perform an action using four different types of object, each obstacle type at two different sizes (same two sizes for...
  17. L

    Two way ANOVA

    Hi, I have 2 groups ('keypad' and 'touch screen'), and each group has teh number of participants who are 'right ahnded and left handed. For key pad: 45 right handed and 42 left handed For touch screen: 9 right handed and 15 left handed. Can I use a two way ANOVA for this? the number...