5.7, due Fri Nov 3 17

difficult:

I really don't have an intuitive idea of what covariance means, and hence understanding the calculations dealing with it was also a bit difficult, especially understanding the matrices full of variables that were being shown.

Application:

Well, I suppose that this has a lot of applications. Most systems that we model aren't single, or even bi-, variate, but multivariate, so understanding how/why these things work will help us to model things further down the line in cool ways.

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