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    Logistic regression: dummy variables not significant, what next?

    Hi, I'm running a logistic regression to try a predict landslides in SPSS using a categorical variable (vegetation type) with 6 possible values. In the results, the variable as a whole is significant although a couple of the dummy variables have p-values > 0.05 and thus are not significant...
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    Unbalanced dependent sample and intercept correction

    Hi, I’m running a logistic regression analysis in SPSS and wanted to ask about the sample values for the dependent variable (landslide presence). My dependent variable is binary and has observed values of 1, or presence of landslides (252,204 cases, 86% of the sample), and 0, or absence of...
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    Logistic regression. How to combine classes in a mullticategorical variable?

    Hi, I’m preparing some data with a view to carry out a multivariable logistic regression. The dependent variable is LANDSLIDES, i.e. occurrence, and is dichotomous (YES/NO). The independent variables are a collection of environmental factors, such as VEGETATION, SLOPE, ELEVATION, and...
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    Positive chi-square test: what to do next?

    Hi!! I'm analysing two categorical variables, Landslides (YES/NO) and Vegetation (grouped into 18 classes), and I'd like to explore and model the relationship between them. Firstly, I've carried out a chi-square test for independence that has returned a positive result, i.e. the two...