spps

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    Spearman Rank + Quadratic Regression (spps) HELP! x

    Hi, I'm trying to find out if there is a significant correlation between salinity and no. of Bivalves found on a shore. I did a Spearman Rank and this was my result: "There was a statistically significant correlation between Salinity and the number of Bivalvia individuals (Spearman Rank...
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    Outliers, winorising and t-test

    I have two group of 25 and 27 people. I want to compare them on a sex activity score that vary from 0 to 9. My distribution is algedly normal, the skewness and kurtosis respect parameter, but most people have answers like 0 or 1. I have three people eith a score of 4, and one 6. Using z...
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    [SPSS - wilcoxon/paired t test] - not normally distributed data

    Hello! I ran an analysis of my data of research into a repeated measures design and found the difference of both conditions to be not normally distributed. When exlcuding data to make it normally distributed and thus use parametric tests, can we only exclude data that exceeds the limit of...
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    How to do Redundancy Analysis (RDA) in SPSS?

    I am using stats to assess data collected for my dissertation - looking at invertebrate families and how their community composition is affected by habitat. I've been advised to carry out a constrained ordination or RDA, with the taxa as response variables and habitats as explanatory...
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    SPSS, co-occurence measure ?

    Hi, I want to see if two conditions always occur together, using SPSS. That is, I have some events that show a certain characteristic, let's call is 'X'. I want to check when this characteristic appears, and if it is bound to condition A or B. Furthermore, I want to know if it there is any...
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    How to make a scale of multiple choice questions?

    I have this scale form an article (unfortunately doesnt say what they did to make all items into one scale) its composed of 6 questions 4 multiple choice and 2 yes/no. How do i put these together to make a new variable because they are all part of the same construct. FOr example the multiple...
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    [SPSS] Kaplan Meier not showing censored data

    Hi, I'm trying to compare two Kaplan Meier survival curves in SPSS. It's about the overall survival between two groups. Now I've entered the months (as time), the status (0=censored, 1=deceased) and I put my variable 'group' into the factor box. But then, when I analyze, it doesn't show...