I dislike education acronyms, but I can make exceptions for mathematical ones. One of my favourite topics in A-level Maths is full to bursting with them: DRVs, CRVs, PDF, CDF. This is a visual representation of the CDF (cumulative distribution function) of a CRV (continuous random variable), which is the function for the area under the curve from *x*=-∞ to any other value, *a*, or more specifically, P(X<*a*). Take note of the syntax for piecewise functions. Continue reading “Continuous Random Variables (Desmos)”

Last year I made a couple of models on Desmos to demonstrate aspects of the normal distribution to my statistics students.

In this first one, you can set a normal distribution with any mean and standard deviation and then show what happens when you subtract *μ* and divide by *σ* to standardise the distribution (to do this, simply move the sliders). It’s great because students can now visualise the procedure they are carrying out. Continue reading “The Normal Distribution (Desmos)”