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For statistical topics which involve the assumption of linearity, for example, linear regression or linear mixed models, or for the discussion of linear algebra as applied to statistics.

0 votes
1 answer
53 views

Analyzing relationship between two variables with not-normal data and heterogeneity

Initially, I wanted to do linear regression. So, what test can I do to at the end say like 'When x does this, Y does this'? …
koras's user avatar
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1 vote
1 answer
3k views

U shaped data in Simple linear regression

I am working on an analysis of a simple linear regression and I don't know what to do. This is my graph: the p-value is <0.0001 but the data is clearly not linear and $R^2$ value is really small. …
koras's user avatar
  • 51
1 vote
1 answer
699 views

RMSE significance

I am running linear regression, I have over 80,000 observations and 5 predictor variables. I am trying to pick the best model with RMSE and R-squared and I understand how all that works but... …
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  • 51