https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4741409/
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Sometimes when you are running a regression model with variables that have different lengths, r will prompt with the following error message...
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In linear regression analysis, If the predictor X is the numerical variable "calories", then an increase of X from 10 to 30 will h... -
*using retinol data from below link {gmodels} CrossTable (retinol$agecat1, retinol$tabac, chisq=TRUE) | retinol$tabac ...