tranformation

  1. A

    Outliers Parametric model

    I'm struggling to decide how to normalise my data for modeling. I am dealing with crowdfunded projects and a huge chunk of them (15%) raised $0 - $10 dollars, therefore failing. Those produce a very strong positive skew that is impossible to normalise. (tried log, z-scores, cubic). And will...
  2. A

    transformation on variables

    I run simple linear regression, and saw that my residuals not distributed normally. my dependent variable histogram was as log-normal, i did a log-normal transformation to him. After that i run linear regression with log(dependent variable), and got results. I attached the results. what do you...
  3. Y

    T-Transformation & Scales? Transforming 3 different variables into one variable

    Hello, If anyone could help me with this SPSS question I will be forever grateful. :) I have three measures in my survey regarding drinking behavior and after conducting a chronbach alpha test they are essentially the same question asking the same thing (alpha= 0.582). I would like to...
  4. R

    Transformation to improve normality

    Hi, I have a problem with some data that I am trying to analyse in a Repeated Measures design. I have 5 conditions (variables), 13 subjects, data points ranging from about -40.0 to +40.0 Both the Kolmogorov-Smirnov and Shapiro-Wilk tests are significant for some of the variables. Some of...
  5. L

    multiple regression with power law relationship [help!!!]

    I am trying to carry out multiple regression of a dependent variable (DV)with 2 independent variables (IV1 & IV2) that exhibit power law relationship with the DV. i.e. DV = a*IV1^b and also DV = c*IV2^d where a,b,c,d are the coefficients of the power law relationships When I plot...