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Questions tagged [variable]

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Problem with non standard question about latent variable applied non-linear discrete choice models [closed]

Problem with non standard question about latent variable applied non-linear discrete choice models. I'm having issues because I couldn't find in the material I have in my possession any example ...
24 views

41 views

Create composite variables using items with different scales- dealing with multicollinearity

I have IV's that are highly correlated with one another. The first set of correlated IV's, I combined them by adding the score and dividing by 2 to create a composite score. This was simple because ...
16 views

What is a variable selection and especially a “model-free” variable selection

First, I just want to make sure that I understand model selection properly: Model selection is a procedure on which, given a collection of models (=hypotheses), we select one which is "best" (by some ...
33 views

Calculating value of a variable from correlated variables [closed]

I have 4 different variables (3 known and 1 unknown) correlated among each other. Y,Z,W are the known variables and X is the unknown variable. I have calculated the correlation coefficients of ...
133 views

Interpreting units for random forest variable importance

I've trained a random forest for classification in R's caret package using the ranger method and impurity for measuring variable ...
5 views

What model should I use if I want to describe the relationship between the % and binary outcome

I want to model a relationship between the % of students who received a flu vaccine at a certain school and whether their school had a flu outbreak or not. Thanks
34 views

Statistical Test According to Independent Variables

I wish to test a statistical significance between means of data groups. The groups are determined by a continuous variable, however this continuous variable is applied to different test subjects (...
40 views

What type of variable is this?

The dependent variable takes values [0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10] Strongly disagree is coded as 0 Strongly agree is coded as 10 This is like some kind of adapted Likert scale? SPSS lists this ...
58 views

Dummy Variable, Reference Group

My job is to create a dummy variable so that those who voted for the Labour Party are compared to a single reference group that includes all other voters. 1 = Conservative, 2 = Labour, 3 = Liberal ...
12 views

how to quantify the patterns of multivariate distribution (e.g. clustered in the center vs. spread out all over the place)?

I am wondering if there exists a well-established way to quantify such patterns (please see the graph)? I guess there should be multiple ways to quantify it or multiple aspects that can be quantified. ...
38 views

Which test to use?

I'm trying to figure out which test I would run for a study. Our research question is does the degree of disc extrusion increase with various body positions compared to a supine (lie on their back) ...
94 views

Regression: very basic questions [closed]

I am about to implement the regression. Since I am analyzing on my own, and have almost zero practical know-how of statistics, I doubt myself a lot (plus the results I have obtained so far look 'weird'...
44 views

Mixed ANOVA, all Sigs = .000?

I made sure everything was done correctly, why would Mixed Anova results in a P value = .000 in all tables, please?
38 views

Mixed-Design ANOVA Confusion: Do I separate my treatment Column?

In this particular study, I had 40 experimental subjects which were randomly allocated to 2 treatment groups. After the initial treatment, each where randomised to receive 2 other treatments. So the ...
271 views

Would “percentage of correct answers” be considered interval or ratio data?

I'm currently working on a research assignment an I'm trying to determine whether a dependent variable like "percentage of correct answers" would be considered interval or ratio data. I was originally ...
29 views

Ordinal or Interval Level of Measurement?

If we have a score of number of students in a kindergarden, which goes "one, two, three, four, five, six and more", is this variable interval or ordinal? The differences between them are exact, yet ...
83 views

What would cause Random Forest to not predict the values on the tails?

In the scatterplot below you can seen that my Random Forest prediction does not predict values at the extremes(i.e above 200) on my test data. My training data has values in that range, just not that ...
49 views

Computing new variable of nominal and scale z scores variables

I'm analyzing a set of data where participants' reaction time and number of errors made during the task were measured. As there were two trials (where same data was measured) I was thinking I could ...
679 views

Difference between conditioned and conditioning variable?

Is there any technical difference between a conditioned and conditioning variable? E.g. see below picture Can I call both X ...
1k views

What type of data are dates?

According to Yale: Categorical variables represent types of data which may be divided into groups (Lacey M, 1997) To me, dates do not fit this definition. They are ordinal, as one date is ...
22 views

1 IV with two categories and 5 DV, which statistical test to choose? [duplicate]

I'm wondering which statistical test to chose to find out which of my five DV is the difference between Country X and Country Y not statistically significant? My Variables are: 1 Independent ...