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6 votes
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I think standard deviation of y is related to size of x. How do I create a model for this / test this?

One way to model this type of relationship is by using generalized least squares (GLS). GLS allows you to specify variables which have a relationship not just with the mean of the response, but also ...
Frans Rodenburg's user avatar
3 votes

Interpretation of plots of residuals vs independent variables in multiple regression?

Purpose of Residuals vs Independent Variables Plots Examining the model's residuals against independent variables serves two main diagnostic purposes: - Detection of Heteroscedasticity: While the ...
Robert Long's user avatar
3 votes

I think standard deviation of y is related to size of x. How do I create a model for this / test this?

You are asking models of the variance function, or something in the same vein. There has to be some sort of smoothing in the variance model, because we don't expect anything useful can be done if each ...
Zack Fisher's user avatar
1 vote

What criterion to use to compare multiple correlations of binary variables?

I think the problem might be that your formulation of null-hypothesis is not actionable. 'Question formulated less clearly than the rest' ... how would one derive something computable from it? You ...
Cryo's user avatar
  • 783
1 vote

Which analysis instead of linear regression?

Summarizing comments: If there no other variables to be modeled, then the Spearman rank correlaion is a good choice. It makes no assumptions about distributions, as it works solely with the ranks on ...
EdM's user avatar
  • 95.7k

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