Useful tips for everyday
Can Gradient Boosting be used for regression? This example demonstrates Gradient Boosting to produce a predictive model from an ensemble of weak predictive models. Gradient…
What is the trim and fill method? The idea of the trim-and-fill method is to first trim the studies that cause a funnel plot’s asymmetry…
What makes random forest regression different for training set? In your case, the difference comes from “overfitting”. That means, your model have learned “too much”…
How does power affect statistical significance? Power refers to the probability that your test will find a statistically significant difference when such a difference actually…
How many outcomes are possible with 5 dice? 7776 possible outcomes The last die may have six values. For each of these six values, the…
What does it mean when something is non-linear? Nonlinearity is a term used in statistics to describe a situation where there is not a straight-line…
What is the Cauchy-Schwarz inequality used for? The Cauchy–Schwarz inequality is used to prove that the inner product is a continuous function with respect to…
How does small sample size affect statistical significance? Small Sample Size Decreases Statistical Power The power of a study is its ability to detect an…
How competitive are statistics PhD programs? It’s REALLY hard. PhD admissions in statistics are really competitive , since number of open positions is quiet low.…
What does a PCA Biplot tell you? In summary: A PCA biplot shows both PC scores of samples (dots) and loadings of variables (vectors). The…