linearity

  1. L

    Can I test linearity and homoscedasticity between a ordinal and scale / continuous data?

    I want to use a scatter plot to test the linearity and homoscedasticity of my data set. My dependent variable is depression score which is continous and scale data. Can I test the linearity between depression score and categorical variable such as gender (1=female, 2=male)?
  2. M

    Binomial logistic regression linearity assumption with categorical variables ?

    I am trying to run a binomial logistic regression, and would like to check the linearity assumption. However all the resources I'm reading discuss the procedure for continuous variables, and I am only working with ordinal/categorical predictors. Can someone take me through it step by step, or...
  3. S

    Assumptions of linearity for parametric tests?

    Do parametric tests make assumptions regarding linearity? Whether yes or no, how can I explain this? It seems to me as though regression analyses assume linearity, but I can't seem to figure out whether these can be parametric tests or not. Many thanks!
  4. P

    Multiple regression analysis - Linearity/homoscedasticity

    Hello, I am currently having trouble determining if my predictors show enough linearity to be used in a standard multiple regression analysis, and if I fulfill the requirement of homoscedasticity. Trying to work through a guide on statistics.laerd.com. Would greatly appreciate your feedback...
  5. E

    Regression analysis with independant variable (error) and multiple dependant variable

    So I took a lot of data (~10000) on a machine (3D printer). For each reading, I got the error and a lot of different parameter (speed, voltage, angle, temperature etc.). My first analysis showed me that none of the parameter clearly explain my error, but a correlation is clearly visible...
  6. A

    Plot Characterization

    Hi all, I am plotting voltage errors (Y) vs positions (X) X values are always sequential and ordered ascending I am concerned primarily with the linearity of the plot. The data is saved after viewing the plot. The plot gives a lot of information visually to me. My goal is to preserve...
  7. D

    Linear relationships between variables from different, but related data sets.

    I had a quick question. And I am sorry if it seems elementary, but I just have so much trouble with statistical analysis (I use R when I do it generally though). I am trying to test the correlation between the % coral cover at each of my study sites, and the % of coral in sediment collected...
  8. Phaedrus

    Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship between a given predictor and my dependent variable is (more or less linear). I understand that the logit of the outcome ought to be linear, not the...