no teaching Wed May 15

I'm away Wednesday May 15, and it turns out my intended "vikar" can't make it after all -- hence there's no teaching that day.

For Wed May 22, do the exercises pointed to in the previous message, and then I'll also go through the essence of what remains from Ch 7. Key words there include the Quiet Scandal of Statistics and behaviour of post-selection and model-average estimators.

There's also teaching Wed May 29, and we find there's a need for it we can find two extra-hours of going through exercises, before the exam period sets in.