Covariance and correlation

Right away the most important thought in this post: Covariance by itself only gives the direction of correlatedness Without knowing the scales of your variables, you can’t tell which variables are more correlated Imagine we have a sample X filled with weight values of people.In addition we also have another sample Y with height values … Read more

Variance and standard deviation

In this post I will explain how to calculate the variance and standard deviation, what they are, explain two common question which are mostly not clarified in school books/by teachers and also give away a Python code to calculate both. To quantify the variation of values to a mean, one can use the so-called “variance” … Read more

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