# Tagged Questions

119 views

### Simple linear regression with a random predictor

We understand a SLR model as $$y_i = \alpha + \beta x_i + \varepsilon_i$$ with $\varepsilon_i$ i.i.d with equal variance. Suppose I have two instruments measuring a common entity, say, density of ...
77 views

### Can ecological inference problems be solved by fixed effects?

The Ecological inference problem is about drawing inferences on the individual level using aggregate data. The main problems is confounding and aggregation bias. One method to solve the ecological ...
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### How to measure student skill level based on a set of questions answered at different points in time and of different difficulties levels?

I am working on an e-learning system with a friend for our final year (Computer Science) project which is part of the under-graduate programs mandatory 'courses'. I have a question about making ...
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### Inference from state-level polls to national opinions

I'm very new to multilevel-hierarchical models and I've been reading papers by Andrew Gelman and al. (e.g. "State-Level Opinions from National Surveys" Park, Gelman et al. - Public opinion in state ...
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### Semantic Dominance from similarity measures

I was reading a research paper on image annotation. The paper gives an example in which similarity measures between a set of words are given and then semantic dominance of each word is calculated. ...
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### Inference from linear regression slope and Pearson

Sorry if this has been asked before but I've already done quite a bit of work here and I feel like I'm quite close to an answer. I am interested in testing whether the PHP function array_key_exists ...
1k views

### How would you do Bayesian ANOVA and regression in R?

I have a fairly simple dataset consisting of one independent variable, one dependent variable, and a categorical variable. I have plenty of experience running frequentist tests like ...
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### Is it acceptable to run two linear models on the same data set?

For a linear regression with multiple groups (natural groups defined a priori) is it acceptable to run two different models on the same data set to answer the following two questions? Does each ...
I've got an easy question concerning residual analysis. So when I compute a QQ-Plot with standardized residuals $\widehat{d}$ on the y-axis and I observe normal distributed standardized residuals, why ...