# multiple variables

1. ### Should I include all variables in one dataset when imputing missing data using MICE in R?

I have 3 data sets each for a different task with different variables but for the same participants. I have varying degrees of missing data for each set. For example in the one task only 70% of participants completed it, whereas in the other task around 10% didn't complete the task (over all...
2. ### Non-parametric test with confounding factors (many covariates)

First, sorry for my English, if I'm not clear enough, tell me! In my project, I have many variables but a very small sample (non-parametric). I'm trying to prove a link between two variables while correcting for covariates. In short, we are looking at white matter tracts and their links to...
3. ### Which model/statistical test should I use?

Hi, Soon I will be performing an experiment where I must grow 4 different plant species under 4 different stressors, each stressor containing 4 levels of 'severity' of the stressor or in other words a difference in concentration. Growth of the plants will be measured over 22 time points, but...
4. ### Can I correlate multiple variables as a whole?

Hello, i have 2 questionnaires. The first questionnaire is about anger and contains 34 questions (all questions have 1-4 scale, from never to always). The 2nd questionnaire is about anxiety and contains 20 questions (all questions are in a 1-4 scale, from never to always). I want to correlate...
5. ### SPSS - Transforming data for multiple response questions

Hey everyone! Did a search in the forum but couldn't find a thread that has the same issue as me. I found similar issues, but not the same. I have a dataset where users were able to choose more than one option when answering certain questions. In this dataset, the column that contains the...
6. ### Probability of a multiple variables sum

Hi everyone, I’m coming here for really advance statistic/probability advice. I would like to know the probability of a variable TAU_total such as TAU_total=TAU1+TAU2+….+TAU129. The variables TAUi are independent of each other. For each one of them, I have a sample of 20,000 values which you...
7. ### Correlation of two variables through others

Hi, I have two data sets. In both sets there are 3 of the same variables (density, MOE and frequency). In addition to that, each set has one more variable (tension strength and bending strength). Since i can not measure both strengths on one piece, I would like to estimate the correlation (or...
8. ### Repeated measures line graph

Please excuse my lack of understanding for SPSS, it's been a while and I'm very rusty. I want to produce a line graph with a line showing the mean change in patients scores before, during and after an intervention for each diagnosis e. asthma, chest infection, lung cancer. So along the...
9. ### Kappa SPSS

Hello All, Thank you in advance if you are able to provide some information on my question. I am attempting to run Cohen's kappa for inter-rater agreement in SPSS. I have 2 raters; however, there are multiple variables (20+) that they are each rating. My question is how do I go about setting...
10. ### OR with multiple variables!!

Hi everyone! I guess this is easy, but I'm not too good in statistics so I need some help!! I'm trying to evaluate a case-control study, where the most common statistical tool is the OR... but now I'm dealing with a multiple variable analysis: This is an example: I'm analysing the...
11. ### SPSS analysis

Hello, I am investigating the effect of brand personality on brand loyalty. I want to know if certain brand personality traits are more effective at creating brand loyalty than others. I identified 5 main personality traits. Each trait is made up of a number of facets. For example the...
12. ### Nominal Mediation - Is it possible to test for mediation with a nominal dependent?

Hi everyone, I'm currently working on my thesis which involves mediation using nominal independents and dependents, as well as scale mediators. I understand that binary mediation is possible, using logit or probit models. However, is it possible to test for mediation when your dependent...
13. ### Needing a bit of help with sample sizes :)

Hello, I'm new here so apologies if this is a simple question, I have tried a search online and here, but I'm am rather stuck. I am trying to do a sample size calculation for a multiple pairwise comparison. Within my study, participants are given three types of candy (A, B, and C)...
14. ### Logistic Regression and Multiple Regression

Hi, Please could you help me (or direct me to someone who can help me) with the following: I have a spreadsheet with a number of environmental independent variables (e.g. slope, radiation, etc.) with dependent variables (presence absence and densities of two plant species Ls and Ee). MY...
15. ### Question about a strange type of variable in Cox regression table

I have a question about this Cox regression analyse table; If you take a look at the valuation of variables in this table, you will see that some are coded binair (0 or 1). But for some reason the author of this table used for 'tooth type' a valuation from 1 to 6. So my questions are; Is...
16. ### Doublecheck: MMerge on Three Variables?

Thanks for taking the time to read this! The Situation I want to merge two datasets together. For the sake of example, the datasets contain the following info.. Master: SpecificStockPicks, Player, CompanyName, TickerSymbol, StartMonth Using: CompanyName, TickerSymbol, S&PMonth, StartMonth...