Useful tips for everyday
Why is my covariance matrix not positive Semidefinite? 3 Answers. The covariance matrix is not positive definite because it is singular. That means that at…
What does a larger test statistic tell you? Test Statistics and P-Values The larger the test statistic, the smaller the p-value and the more likely…
Is the Gauss copula a multivariate normal distribution? So, the Gauss copula is simply a standard multivariate normal distribution where the probability integral transform is…
Is linear regression the same as Pearson correlation? A correlation analysis provides information on the strength and direction of the linear relationship between two variables,…
Is the probability distribution a maximum entropy distribution? Every probability distribution is trivially a maximum entropy probability distribution under the constraint that the distribution have…
When do you use 2 way interactions in linear modeling? Understanding 2-way Interactions When doing linear modeling or ANOVA it’s useful to examine whether or…
How is logit regression used in data analysis? Logit Regression | R Data Analysis Examples. Logistic regression, also called a logit model, is used to…
What is pre-training data? Pre-training in AI refers to training a model with one task to help it form parameters that can be used in…
How to write a conditional weighted average formula? Thus, coupling the conditional SUMPRODUCT formula with the conditional SUM formula (via the SUMIF function), we can…
What are lag features time series? A lag features is a fancy name for a variable which contains data from prior time steps. If we…