Bayesian Linear Regression With One Input - Given Variance

[allan]

Hello, there,

In real life if one is wanting to use the model with given variance, we can use the empirical variance from y_train? Is this the usual approach?

[lazyprogrammer]

Thanks for your inquiry.

This is mostly a theoretical course in preparation for future courses, so one has to keep that in mind.

Look at the final code lecture to see how we deal with it (empirical estimation). Or you can use the full Bayesian method in which the variance is assumed unknown and the posterior has a t-distribution.