Useful tips for everyday
What does it mean to have correlation between two variables? Two variables could depend on a third unknown variable. It can be useful in data…
How many trials are required to validate a hypothesis? For a typical experiment, you should plan to repeat the experiment at least three times. The…
Are there 99 or 100 percentiles? Example of 3): For a normal distribution, the 100th and 0th percentiles do not exist (or they “are” ±∞).…
What is difference between the statistical model and mathematical model? General remarks. A statistical model is a special class of mathematical model. What distinguishes a…
What is the difference between AB and a / B testing? AB testing is pretty simple to understand: A typical AB test uses AB testing…
When testing for the difference between two means if the population standard deviation is unknown One possibility is to use the? Aspin-Welch t-test Note: The…
What is nominal confidence interval? The confidence interval aims to contain the unknown mean remission duration with a given probability. The “nominal coverage probability” is…
How do I fix CatBoost overfitting? If overfitting occurs, CatBoost can stop the training earlier than the training parameters dictate. For example, it can be…
What does a significant interaction in ANOVA mean? When an interaction effect is present, the impact of one factor depends on the level of the…
What is statistical efficiency? A measure of efficiency is the ratio of the theoretically minimal variance to the actual variance of the estimator. This measure…