1. H

    Statistical tests - help please!

    Hi all, I am writing a project plan and I am struggling with the statistical analysis plan as I am in the early stages of learning. I was hoping someone could guide me with what stats tests I could conduct with the following primary endpoint - thank you. Alternative hypothesis: treatment is...
  2. V

    Logistic Regression interpretation

  3. R

    Help deciding which spss functions to use

    I'll start off saying that stats in general has never been a strong point for me :D The variables i am using are; Gender Age Relationship Status Number of dependants Profession Neuroticism (Higher score = higher neuroticism) Affectivity (Higher score = positive; lower...
  4. T

    Uncertainty about normality (Q-Q Plot)

    Hey everyone, I've done several linear regression. Now I would like to test if my residuals are normally distributed. That is how my Q-Q Plots look like: But I'm not sure what to make of the Q-Q Plots. Most of them are pretty much on the line, except for the beginning and ending. What do you think?
  5. N

    Multivariate logistic regression?

    Hi! With my master thesis project, I only use categorical data. I have one independent variabele, with four categories. My dependent variables are dichotomous (yes/no). I would like to use logistic regression to calculate the odds that when the categories of my independent variable are...
  6. S

    Getting ANCOVA results with a regression

    Hello ! My outcome variable is a change variable that can take positive and negative values. My ancova has 1 factor (with 3 categories) + 1 continous covariate + a categorical noise variable. Only my outcome variable has missing data. I have to do a sensibility analysis comparing results from...
  7. L

    How to study the effects of alcohol consumption on happiness & cognitive function?

    Hello, I want to study if there's a relationship between alcohol consumption and happiness + cognitive function. Most of my data is nominal or ordinal. To measure alcohol consumption: How often respondent has had an alcoholic drink during the last 12 months To measure happiness: Overall...
  8. M

    Logistic regression model - numeric predictors modification

    I am running a regression using multiple variables in order to predict a binomial outcome. Two of my variables are numeric, most are categoric. My two numeric variables are age and bmi. I have calculated an odds ratio for each of those variables (e.g. if the bmi increases with 1 point...
  9. T

    Regression to find out the impact of the Brexit vote on migration (pre-Brexit)

    Hello and happy new year, I have a minor in statistics and am having some trouble finding the right variables for my regression. I know that you need 1 independent variable and 1 or more dependent variables. For example, you could calculate what effect the independent variable "income" has on...
  10. N

    What Model or Calculator should I use to set the right target?

    I have a production target in which 90% of widgets must be completed within 2 hours. The production process has two main components. Process A + Process B (together these have to be completed within 2 hours, 90% of the time). (quick note: Process A is the simpler process) I want to establish...
  11. J

    How to Analyze Continuous IV and DV?

    I'm a relative novice at statistics and would appreciate some help with a dataset I'm trying to crunch. I'm currently looking at factors that predict increasing utilization of healthcare resources following surgery in a set of 130+ patients. Some of the independent variables I'm looking at...
  12. P

    Understanding prediction output of zero-adjusted gamma model

    I am currently trying to implement a mixture model using the gamlss package in R. What I am trying to achieve is train a zero-adjusted gamma model on a training data set and then predicting values out of a test data set. Setting up the model is no real problem, I do this by ZAGA_Model =...
  13. hlsmith

    ROPE value in Bayesian Regression

    I am fitting a Bayesian regression model. The outcome is continuous (patient length of stay; a little skewed) and the independent variable is binary (treatment; y/n). There are a couple of covariates (continuous) in the model as well. I wanted to test that patients in the treatment group do not...
  14. O

    Advice on repeated measures ANOVA vs multi-level model

    Hello! I have a situation that I have never encountered before, but I think I know what the issue is. Nevertheless, I could use some assistance. I ran an experimental study with a within-subjects design. Subjects learned words under 4 different conditions (A,B,C,D), 30 words in each condition...
  15. S

    Entropy Balancing in Panel Data Setting

    Hi everyone, I want to examine the effect of a treatment on an observation group with a Diff-in-Diff approach in a panel data setting in Stata. To avoid differences across subsamples I additionally using entropy balancing. Now, I have a methodical question. I have already read some papers on...
  16. M

    Multiple Linear Regression

    Hello, I am an MBA student and require help doing a multiple linear regression analysis using spss, check if I uploaded the data with the correct options and how to interpret the data and results. I have 2 independent variables and 1 dependent variable. Thanks!
  17. R

    Omitted group in regression

    Hello all, I understand that if you have individual level data and you are trying to calculate something like income you might run a regression like probability of incarceration = intercept + education_level +other_controls . . . + error where education_level is a categorical...
  18. J

    multivariable regression equation with interaction terms for difference-in-difference method

    I am doing a difference-in-difference analysis on a set of survey data for a health education program and I need to find statistical significance for the difference-in-difference estimate. I know that I find this using a regression. I need to use a regression in a mixed logistic model including...
  19. james.wilson

    I need guidance on figuring out a linear regression model from a dataset

    Hello, I'm completely stuck on this. If anyone could guide me in the right direction for this linear regression model it would be very appreciated! Dataset:
  20. C

    Interpreting mulitiple regression coefficients

    I am quite new to statistics and trying to get a grasp of it with some coronavirus data. So, I have 16 countries and I want to find regression of coronavirus cases by population pyramid. I am using this equation. In my case it looks like this: (Obviously in calculations the first column is...