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Dear all, I recently posted this question in another website, reposting it here in case I get any answers. I'm relatively new to this, so maybe I don't include all the information necessary in order to solve this, or I should post it in another forum - please let me know in that case. Our...

Hi all, I need some help with my SPSS testing. I am testing how salinity causes a difference in population growth for a species of jellyfish polyp. I have 3 groups of jellyfish polyps, which remain independent from each other. Each group of polyps is put under a different treatment of...

Solved I am very new to R. I am having difficulties understanding how resolve a couple of error messages. Warning messages: 1: In if (!header) rlabp <- FALSE : the condition has length > 1 and only the first element will be used 2: In if (header) { : the condition has length > 1 and...

When I perform a normality test for my variables using the grouping variable named "Group", I got a warning message telling me that there are values in the grouping variable named "Group" equal ".." ! knowing that I revised all the values in it and they were all with specific values .Also the...

Hello fellow R users :wave: I hope someone can help me solve this problem. I've been looking for a solution all day. I have a proportional response (% cover) variable. I have 2 explanatory factors, both with 3 or more levels: quadrats (of which there are many) and year (of which there are...