anova

  1. victorxstc

    SPSS - Using mixed univariate ANOVA (UNIANOVA) or mixed linear regression (MIXED) instead of repeated-measures ANOVA

    Which process is better for using instead of Repeated-Measures ANOVA (SPSS syntax: GLM -- GUI command: Analyze --> General Linear Model --> Repeated Measures)? and Why? (1) Mixed univariate ANOVA (SPSS syntax: "`UNIANOVA`" -- GUI command: Analyze --> General Linear Model --> Univariate) (2)...
  2. S

    Standard deviation from ANOVA-table

    I am trying to find an estimate for σ , based on the ANOVA-table under, but I dont know where to start. Is it possible to find the estimate for σ from the residual standard error? if so, how?
  3. R

    Help deciding which spss functions to use

    I'll start off saying that stats in general has never been a strong point for me :D The variables i am using are; Gender Age Relationship Status Number of dependants Profession Neuroticism (Higher score = higher neuroticism) Affectivity (Higher score = positive; lower...
  4. H

    Do I need a two-way MANOVA test?

    I am testing for differences between 3 groups. I have 2 dependent variables which are continuous data. However, I am confused about my independent variables and if a two-way MANOVA test would be suitable. My three groups are Rural, Semi-rural and Urban (3 groups). For each group I am testing...
  5. S

    Which test for hierarchical within-between design?

    Hi everyone, I'm about to design an experiment with one independent variable of three levels. However, two of the levels can be 'grouped together', and I'm quite unsure about if my experiment design makes sense, and even more important, which statistical test I can use for evaluation. For...
  6. D

    Should I use repeated measures ANOVA or one-way ANOVA?

    I am conducting a study on different image reconstruction algorithms for computed tomography (CT). My aim is to investigate which of the image reconstruction algorithms that have the highest signal-to-noise ratio (SNR). My dataset is 100 patients who underwent a CT brain scan. Each CT scan will...
  7. L

    SPSS - ANOVA test and & Post Hoc

    Hi, I have conducted both ANOVA along with Post Hoc Test on SPSS. However, I have encountered a problem on the Post Hoc Tests. In particular, between the multiple comparisons and homogeneous subsets sections. My problem is under the multiple comparisons - the category 7 is not statically...
  8. J

    ANOVA - separate for subjects and items, and how to aggregate

    Hello everyone, I have a basic statistics exam coming up and while studying found the instructor's notes to be a little short in one area. In the field of linguistics, separate ANOVAs for subjects and items are fairly common to get results that are generalisable for people as well as stimuli...
  9. L

    Two-way-ANOVA in vassarstats.net

    Hello, I am using vassarstats.net for a two-way-ANOVA with repeated measures on both factors. The results for row and column variables seems to be alright, but the interaction effect between row and column variables shows a F value of 0 and a p-value of 1. I don't understand how I should...
  10. L

    How to study the effects of alcohol consumption on happiness & cognitive function?

    Hello, I want to study if there's a relationship between alcohol consumption and happiness + cognitive function. Most of my data is nominal or ordinal. To measure alcohol consumption: How often respondent has had an alcoholic drink during the last 12 months To measure happiness: Overall...
  11. A

    Multiple Imputation in SPSS: What to do and report

    Hi everyone :) I'm currently working on a research question where there are 2 categorical predictor variables (one with 2 levels between subjects, the other with 7 levels within subjects) and one continuous response variable. I want to conduct a simple repeated measures ANOVA in SPSS. The...
  12. L

    Working with zoo closed population - observation study - Which test?

    Our title: Investigating the anticipatory and aggressive behaviour of a captive group of Sulawesi Crested Macaques (Macaca nigra) during different feeding times and enclosure location. Confused as to what stats test to use as > we have 3 independent variables (explanatory as observation) 1)...
  13. S

    Assumptions for a 2 x 2 repeated-measures ANOVA

    I am currently working on a 2 x 2 repeated-measures ANOVA (rmANOVA), and I am unsure as to which assumptions I need to investigate and how to investigate them. It's a behavioral experiment. I have 30 subjects and 4 (2 x 2) measurements from each of them. There are equal sample sizes (30) in each...
  14. H

    Is this group of data different from the rest: From ANOVA to...

    Hi! We have performed an experiment to see if semi-wild pigs have any food preferences (in what type of nutrient supplement we add to the food). Different foods were added in their home range at each their place. After each trial we counted the number of food pellets that were eaten. So...at...
  15. D

    ANOVA analysis of two site management types

    HI. This is my first post so if it's in the wrong category etc. please let me know. Some background to my question: I have titrated biomass samples which came from either a conventionally farmed field or one with special treatment to find their raw protein content. I want to be able to say...
  16. J

    Why does the “linear regression t-test” return a p-value (two-tailed) from regression that is twice the p-value from ANOVA? (Binary predictor)

    I'm using the "linear regression t-test" guide at https://stattrek.com/regression/slope-test.aspx The guide shows calculating t =b1/SE, where b1 and SE are provided by the regression function (here lm() - using R.) The guide shows the p-value gets doubled as this is a two-sided test...
  17. S

    Help on data correctness for ANOVA

    Hello friends, My aim is to study the nature of length of stay of vechicles in a parking lot. A day is split to 3 sessions namely Morning - 10am to 2pm, Afternoon - 2 pm to 6 pm, Evening 6pm to 10pm. Given the In time and Out time of a sample size of 9000 vechicles, I need to statistically...
  18. R

    Please help with outliers :(

    I am conducting research on the effects of social media usage (frequency of checking and duration) on body image and self esteem n = 264. Every ANOVA is not significant :( however Boxplots have revealed a good number of outliers. When I removed 5 "moderate outliers" (between the mild and extreme...
  19. M

    I need advice; Correct statistical model in preclinical experiment

    Hi all, I made a specific preclinical experiment to test an effect of new drug on memory. I used water maze test (behavioral test based on learning and orientation in space) with 4 groups of animals (each group n=7), 3 different treatment groups and 1 saline group. I measure three values; time...
  20. P

    What kind of statistical test would I use for this experiment?

    Hi there, I'm sorry I'm still very new to this platform and am generally clueless about statistics. This may be a little long winded, but I'd really appreciate any help! I have two groups of organisms, all of the same species but from two different habitats, labelled "group 1" and "group 2" as...