non normal distribution

  1. M

    What tests to use for analyzing data that is categorical and continuous

    Hey everyone, for my master thesis, I'm analyzing a bunch of patient data. I have very limited statistical experience hence the question here. The data set includes both categorical variables and continuous variables. the continuous variables don't seem to be normally distributed...
  2. K

    Questions concerning the analysis of my Data

    Hello everyone, I received some old data that I am now supposed to analyze, however, deciding for an appropriate statistical test turned out to be a little hard for me, so I could Need your help! The data are basically from a 2x2 factorial design with Pre- and Posttest measures. It is an...
  3. N

    Linear regression analysis

    Hi all, I am having problems with analysis. I want to perform a multiple linear regression. 1). The dependent variable and all but one of the independent variables is normally distributed. I was made aware that the independent variables don't have to be normally distributed to use it for a...
  4. T

    Please help me choose the appropriate test for a directional hypothesis

    Hi everyone, I've been asked to take a new direction with one of the research questions in my dissertation fairly last minute so I'd be really grateful of your help. I'm looking at the pH values from two treatment groups and my hypothesis is: H1: The heat samples have a significantly more...
  5. M

    Problems with GLMM results

    Hi all, I apologize if this is a stupid question, but I'm kinda new to GLMM on SPSS. I'm analyzing non-normal data (hormonal response from primates to different factors) from a 2 year study and I'm having some trouble interpreting my GLMM results. All the results I get give me p=0.000 which I...
  6. P

    Help analyzing nonnormal data

    Hi everybody, I'd like to perform an ANOVA or similar with data whose residuals are nonnormal. My dependent variable is 1-7, but about 30% of my respondents provided 1's and the plurality of the rest provided 2's. I've tried log and square root transformations with no luck. Any advice on how...
  7. P

    Testing scalar invariance of a second-order factor model in LISREL

    I have a non-normal data for which I used satorra-bentler chi square. The problem I am facing is in testing the measurement invariance of a second-order factor model in lisrel. Unfortunately, the lisrel tutorial only shows examples of first order factor models and there is hardly any mention of...
  8. P

    Calculating ensemble value for data with non-gaussian errors

    I have 10 data points each of which have non-symmetric (i.e., non-Gaussian) errors. That is, if 'a' is the central value (representing the median), then a^{+b}_{-c} means that 'b' is the positive 1-sigma error and 'c' is the negative 1-sigma error. I want to be able to get a representative value...
  9. I

    Missing value imputation on a non-normal distribution - EM vs Regression? Or else?

    Hi, Bit green when it comes to some of these methods, so please be gentle... but I'll try to provide as much info and concisely as possible. Any help sincerely appreciated. I have a non-normal dataset with missing at random data and am trying to determine which imputation method to use. I...
  10. B

    Proper analysis for group differences in proportion scores

    Hello all, I am running analyses looking at group differences in the proportion of time kids were distressed in a task. I have a task that has been broken up in to 10s time slices and kids receive a score of 1 in each slice they evince distress. To create my outcome variable, I am dividing...
  11. T

    Help with C.I. for non normal probability distribution Excercise

    Hi! first time poster here! I have done (correctly I hope) most of the exercise except for segment "B) i)" So I need help with it :(:( Here's the exercise [What I've got so far] n = 10 A) sample mean (x) = 5.7 ; Std Deviation = 3.257 B) ii) Error = 2.0143 ; U € [3.685 ; 7.714] 95...
  12. M

    Help with non normality distribution. Transformations didn't work. Help!

    Hi, new to this forum. I'm writing up my MsC in psychology and I've got problems with my data. The study involved administering questionnaires to 157 young carers. The dependent variables I've got are: emotional symptoms, peer problems, prosocial behaviour, hyperactivity, difficulties...