# Questions tagged [assumptions]

Refers to the conditions under which a statistics procedure yields valid estimates and/or inference. E.g., many statistical techniques require the assumption that the data are randomly sampled in some way. Theoretical results about estimators usually require assumptions about the data generating mechanism.

1,003 questions
Filter by
Sorted by
Tagged with
56 views

### Multilevel Model Residuals Scatterplot Assumptions

I am conducting multilevel modelling (MLM) in SPSS (mixed modeling) to analyze cross-sectional repeated measures data. One of my dependent variables is a survey question scaled 1 to 10, which ...
• 85
22 views

### Analysis of Variance Assumption Testing When Multiple Error Terms Are Used

I am conducting a repeated-measures analysis in R, where blocks were sampled repeatedly over a season. ...
• 247
1 vote
34 views

### Mixed ANCOVA Assumptions

I have a Mixed ANCOVA. my within-subjects factor is Time [Pre- and post-intervention) and my between-subjects factor is Group [4 intervention]). My IVs are group and time. My DV is happiness, which is ...
• 31
32 views

### Two Way Anova with Heteroscedasticity

I'm trying to run a two way anova test but the homoscedasticity condition is not met. My analysis is not balanced and I have over 3000 observations in my sample. Is it okay to proceed even if the ...
25 views

### Variance ratio below 3

Can it be assumed that the repeated measures (RM) ANOVA is robust, even after having a significant Levene test for a variable? What about if the ratio between the maximum and minimum variance is below ...
40 views

### In linear regression, in what situation(s) would you transform the response variable BEFORE having checked the assumptions?

I have a non-normally distributed, right-skewed response (dependent) variable which will be used in an (OLS) linear regression model. Why would I want to transform this before having checked the ...
• 21