Useful tips for everyday
What are the degrees of freedom for a contingency table analysis? The degrees of freedom is equal to (r-1)(c-1), where r is the number of…
Did not converge in 10 iterations K-means? It means that the partition obtained is not stable (i.e. the algorithm did not converge toward an optimal…
What does Dbinom mean in R? binomial distribution dbinom is the R function that calculates the p. f. of the binomial distribution. Optional arguments described…
What do you mean by confidence interval in statistical analysis? In statistics, confidence interval refers to the amount of error that is allowed in the…
Is it possible for a sample to be unbiased? An unbiased sample can be an accurate representation of the entire population and can help you…
How do gradient boosted trees work? In case of gradient boosted decision trees algorithm, the weak learners are decision trees. Each tree attempts to minimize…
How to detect overfitting with cross validation? There you can also see the training scores of your folds. If you would see 1.0 accuracy for…
How do I choose a classifier? Here are some important considerations while choosing an algorithm. Size of the training data. It is usually recommended to…
What effect size should I use for power analysis? If you want to use an estimate for the power analysis. In common practice, is to…
Can dummy variables be standardized? So each dummy variable is automatically standardized with 0 meaning an observation is not of that species, and the coefficient…