Useful tips for everyday
What is an ensemble technique in machine learning? Ensemble methods are techniques that aim at improving the accuracy of results in models by combining multiple…
What is X in Prcomp in R? prcomp() and princomp() functions x : a numeric matrix or data frame. scale : a logical value indicating…
What is error variance in CFA? Error variances are the portions of variance in each measurement that do not covary with the latent factor. These…
What is variance decomposition in time series? In econometrics and other applications of multivariate time series analysis, a variance decomposition or forecast error variance decomposition…
When Poisson distribution becomes normal distribution? A Poisson distribution is discrete while a normal distribution is continuous, and a Poisson random variable is always >=…
How to generate random samples from a Gaussian variable? Partly based on the ECE662 Spring 2014 lecture material of Prof. Mireille Boutin. 1 1. Introduction…
What is the difference between a main effect and a simple main effect? As you can see, while the number of main effects depends simply…
Which is the sampling distribution of a normal variable? Sampling Distribution of a Normal Variable . Given a random variable . Suppose that the X…
How do you know if a prediction is accurate? Accuracy is defined as the percentage of correct predictions for the test data. It can be…
How do you test if there is a significant difference? Look up the normal distribution in a statistics table. Statistics tables can be found online…