Useful tips for everyday
What is the difference between chi-square test and Anova test? The chi-square is used to investigate whether the distribution of classes and is compatible with…
When do you use a Monte Carlo method? Monte Carlo methods are a class of techniques for randomly sampling a probability distribution. There are many…
Is there a gradient function in MATLAB? FX = gradient( F ) returns the one-dimensional numerical gradient of vector F . The output FX corresponds…
When was meta-analysis first used? 1976 In 1976, one of them, Gene Glass, coined the term ‘meta-analysis’ to refer to ‘the statistical analysis of a…
How is raw moment calculated? A moment about the origin is sometimes called a raw moment. Note that µ1 = E(X) = µX, the mean…
What is alpha and beta in a beta distribution? In probability theory and statistics, the beta distribution is a family of continuous probability distributions defined…
How do you generate a positive definite matrix randomly? The matrix symmetric positive definite matrix A can be written as , A = Q’DQ ,…
How to predict if a customer will buy a product? Assuming a cutoff value of 0.5, since the probability (0.9221) is greater than the cutoff…
What is target value in neural network? Target is the “correct” or desidered value for the respose associate to one input. Usually, this value will…
How are residuals calculated in R? Residual = Observed value – Predicted value One type of residual we often use to identify outliers in a…