Useful tips for everyday
What is a between sample t-test? The two-sample t-test (also known as the independent samples t-test) is a method used to test whether the unknown…
What does S stand for in test statistic? s refers to the standard deviation of a sample. s2 refers to the variance of a sample.…
What is an IPD meta-analysis? IPD meta-analysis is a specific type of systematic review. Rather than extracting summary (aggregate) data from study publications or from…
How do you prove a matrix is not invertible? We say that a square matrix is invertible if and only if the determinant is not…
What are parameters in Bayesian networks? A Bayesian network (Heckerman, 1999) is a particular case of a graphical model that compactly represents the joint probability…
What is bootstrap prediction? Bootstrapping is any test or metric that uses random sampling with replacement (e.g. mimicking the sampling process), and falls under the…
What does Adjusted R Square indicate? Adjusted R-squared is a modified version of R-squared that has been adjusted for the number of predictors in the…
Which one of the following can be used to detect heteroscedasticity in model residuals? Correct! The Durbin Watson test is one for detecting residual autocorrelation,…
How do you calculate dispersion in statistics? Standard deviation (SD) is the most commonly used measure of dispersion. It is a measure of spread of…
How do you calculate percent contribution in Anova? Answer: The percent contribution is obtained by summing all the sum of squares term (SS) and then…