Useful tips for everyday
How can historical data be used? The use of historical data has become a standard tool in economics, serving three main purposes: to examine the…
How to calculate partition Gini index? Summary: The Gini Index is calculated by subtracting the sum of the squared probabilities of each class from one.…
What is Poisson distribution and exponential distribution? Just so, the Poisson distribution deals with the number of occurrences in a fixed period of time, and…
Are there any techniques for generating random samples? Techniques for generating a simple random sample. This is the currently selected item. Posted 4 years ago.…
What happens when data smoothing is used in predictive analytics? For example, if the original data has more peaks in it, then data smoothing will…
What is similar to regression? Alternative procedures include: Different linear model: fitting a linear model with additional X variable(s) Nonlinear model: fitting a nonlinear model…
What is the meaning of the correlation in GLM-cross? This means coefficients themselves are actually random variables that follow a distribution. What you see is…
Can a 2PL model be estimated with ERM? A 2PL model cannot be estimated with eRm, but with the package ltm, for example. The estimated…
Can a dataset be used for cross validation? In the simplest scenario one would collect one dataset and train your model via cross-validation to create…
How to calculate the relationship between categorical variables? For one variable that just involves dividing the count in each category by the total to get…