Useful tips for everyday
What package is RLM in R? MASS package The command for running robust regression is rlm in the MASS package. There are several weighting functions…
How do you know if two equations are equivalent? Two equations are said to be equivalent when they have the same solution set. For example,…
What is an example of observational units? The observational units are what you take measurements on. In the bees example, if the grower counts the…
How is Shannon Wiener index H calculated? How to calculate the Shannon diversity index? Calculate the proportion (pi) of each species – divide the number…
Which are the different states in a concurrent model? The concurrent process model shows the current state of activities, tasks and their associated states that…
How do you calculate excess return? Excess return is identified by subtracting the return of one investment from the total return percentage achieved in another…
How can I check the correlation between…? Now using some machine learning on this data is not likely to work. There just is not sufficient…
What is the motivation to use regression analysis? Typically, a regression analysis is done for one of two purposes: In order to predict the value…
Are conditional probabilities mutually exclusive? The simplest example of mutually exclusive are events that cannot occur simultaneously. In other words, if one event has already…
Does subtracting affect correlation? Adding, subtracting, multiplying or dividing a constant to all of the numbers in one or both variables does not change the…