Useful tips for everyday
Why do we standardize variables Before Lasso regression? I have read three main reasons for standardising variables before something such as Lasso regression: 1) Interpretability…
How are nonlinear mixed effects used in ecological modeling? While the mixed‐effects approach accounts for spatial nesting, temporal dependence, and variance heterogeneity; the nonlinear function…
Is GLM a predictive model? Predictive modeling is the practice of leveraging statistics to predict outcomes. The topic covers everything from simple linear regression to…
How many observations do you need for multiple regression? For example, in regression analysis, many researchers say that there should be at least 10 observations…
What is the purpose of Augmented Dicky Fuller ADF test? Augmented Dickey Fuller test (ADF Test) is a common statistical test used to test whether…
How do you calculate t test? Sample question: Calculate a paired t test by hand for the following data: Step 1: Subtract each Y score…
Why Data normalization is necessary for machine learning models? The goal of normalization is to change the values of numeric columns in the dataset to…
How do you calculate patient treatment years? Patient years are calculated as follows: If 15 patients participated in a study on heart attacks for 20…
Can an experiment have multiple treatments? Studies can also include more than one treatment or control group. Researchers might want to examine the impact of…
How is the percent of null deviance explained in glmnet? It shows from left to right the number of nonzero coefficients ( Df ), the…