1. 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...
  2. 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)...
  3. 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...
  4. 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.
  5. 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...
  6. 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 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. J

    Appropriateness of using ANOVA on PC-scores (PCA)

    Hi everyone, I'm new to the forum but wanted to ask a question about the appropriateness of using a test such as ANOVA or Mann-Whitney U test on the PC-scores of a Principal Component Analysis. I have recently received the critique on a submitted manuscript that it is problematic that I did...
  12. D

    Help with my research question analysis

    Hi everyone, I am a doctor working on a project investigating an intervention we have been using in the intensive care unit in my hospital for treating Covid patients. I am collecting data on all the patients who have been admitted and look at whether they have had this intervention, whether it...
  13. S

    I don't know whether I'm doing ANOVA right!!

    I want to find the significant difference between two groups (1 and 2). As my teacher said I should use anova. but i dont know whether i'm doing that right or not. so these are the percentages: 42.3 44.2 57.6 60.1 66.2 22.6 36.8 58.3 71.6 91.8 the first 5 ones are group 1 and the rest are group...
  14. H

    Testing for similarity between countries

    For my thesis, I am looking at the effect of environmental controversies on the profitability of Chinese and European firms. As part of my exploratory analysis, I have to check whether or not the European countries are similar enough to consider them as 1 group. I collected data on economic...
  15. K

    Comparison Between Three Groups Over Time

    Which statistical test should I use to compare between three groups over time (28 days) using means calculated for the whole group?
  16. B

    [ANOVA in R] Which ANOVA to run?

    Dear forum members, I have been looking for a solution that fits my analysis both on this forum and the web and have returned empty handed so decided to post my own thread. For my Master's thesis, we have performed an experiment with 160 plants from 10 different genotypes, divided in 2...
  17. C

    What test should i use? THESIS HELP!!

    Hi, I am currently studying Zoology at university. I am currently in my final year conducting my dissertation. I have completed my data collection and I am now on to my statistics. My dissertation looks at the relationship between light intensity and growth rate in marine sponges. I have 5...
  18. C

    One way ANOVA or Two Way ANOVA?

    Hi all. I was given this assignment and asked to analyse the data (5% level of significance). Should I be using two one-way ANOVAs to compare the effect of preservative and days (independent variables) on the bacterial count (dependent) separately? Or should I be using a two-way ANOVA to...
  19. 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...
  20. T

    Intepretation of Results

    Can someone help me interpret the following results or tell me how i can do it ? Need to explain these results in my thesis. I would be really thankful for any kind of help.