Hypothesis testing is a useful statistical tool that can be used to draw a conclusion about the population from a sample. Say for instance that you are interested in knowing if the average value of a certain parameter differs significantly from a given value within a well defined confidence level: ...

Have you ever wondered where do all those formulas to calculate the volume of solids like a cone, a cylinder, a sphere ecc… come from? In fact they come from a simple formula and from a clever basic idea. Imagine you have a function f Intuitively you could approximate the ...

This article is a follow up of the following:Gradient descent algorithm Here below you can find the multivariable, (2 variables version) of the gradient descent algorithm. You could easily add more variables. For sake of simplicity and for making it more intuitive I decided to post the 2 variables case. In ...

A copula function is an application which "couples" (joins) a multivariate distribution to its univariate margins (marginal distributions).Copula functions can be really helpful in building multivariate distributions given the marginals. Here is a fast...

Sometimes a value cannot be found so easily, this is the case for probabilities for example. When it comes to find the chances, say of a football team winning a certain match, you cannot use traditional probability approach, which is: or, I should say,...