anova ecology biology

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    ANOVA Errors and Data Issues-Is my data even set up correctly to begin with?

    Hello friends. I am fairly new to the world of statistics. After trying and failing to do R, I have just decided to use Excel for my data. A bit of background: I have 148 sampling sites, each with several species associated with them. I am looking to find the correlation between land use and...
  2. R

    Comparing Groups - Are my stats tests biased?

    Hi, I am testing for statistical significance between lipid (oil) yield of two separate algal species split into four groups total. Each species has been split into two treatment groups, one with fewer nutrients and one with more. Therefore I have four groups to test statistical differences...
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    Is ANOVA right for me?

    Hi there! So I am relatively new to the statistical side of biological data and want to know the best test for my data. The experiment was looking at the concentration of a hormone over time between two treatments with multiple replicates. something like this: Treatment A: Rep 1...
  4. B

    Which stats test should I use?

    I have an experiment to look at habitat preferences of beetles and the effect of competition. In the first test, a beetle is on his own in an arena and I measured the % of time he spends in each of THREE types of habitat (open, bush and underground). I repeat this experiment with several...
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    [Statistica - Nested Anova] How to do a two-way nested anova?

    Hi, I'm trying to do a two-way nested anova in Statistica, but the results do not seen to be a two way model. In my study I need to compare if the abundances (of taxa) differ between my 5 sampling units (sites) considering 2 periods (spring and auttumn). So, I have 2 randon factors (site and...
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    Comparing two factors in five areas

    I recently compared two factors in five different areas testing diversity of one factor against another. (Diversity was made quantitative for comparison using the Simpsons Diversity index) I received a very strong positive correlation between one diversity against another and between areas with...
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    Need help choosing a statistical method/model

    Hello, I am currently doing a study on the defensive behavior of the European Grass Snake, and I was hoping someone could help me figure out which model to use to analyze my data. I have 3 categories of dependent variables - 1) Pre-Capture Behavior 2) Post-Capture Behavior 3)...
  8. K

    Tamhane's T2 verses Dunnett's C and T3 Post Hoc test

    I have been working really hard to find the answer to this question, but the statistical references I have read all say they won't go into detail about these techniques. They give a citation, but I don't have access to it. I have asked the statistics professor in my department, but he doesn't...
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    Is One Way ANOVA the proper test that I should use?

    Hi! I have precipitation data ~20 years. For each year, I have the total precipitation for a given month for that specific year. I am trying to find if there there is a statistically significant difference between the years in the total precipitation. I have organized my data such that each...
  10. S

    Comparing two groups of cells - Which test to use?

    So I have a project to compare the formation of junctions of two groups of cell lines - a normal and a mutated one. I have number of junctions formed plotted against time for each group. For example: Normal cells have 3 junctions after 120 seconds, 6 junctions after 180 seconds... The mutated...
  11. T

    Nested test to remedy pseudoreplication

    Hello and thanks for taking the time to read this. Data structure: I have two datasets from two protected areas that differ in protection status. Both areas contain 43 and 37 sites each. Question: I would like to know which test would be the best for testing whether the PA status has...
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    GW shark study- You give advice on the stats and I give advice on swim spots ;)

    Disclaimer: I am fairly new to the stats side of Ecology, I have carried out a bit of field work in my time but have only come over to the analysis side of things in the last little bit. Please forgive me if my questions seem a little basic- I have to say though that before I posted this...