exercises for Thu Feb 24

1. Dates for the OBLIG will be finalised within a few days, but the tentative dates are t_0 = Tue Apr 19, the day after Easter, to t_1 = Tue May 2. Details will follow.

2. We've rounded off Ch 2, and read to really start on hard-core time series models in Ch 3, from next week.

3. I've uploaded so far com1d, com101a, com5a, com6a; check these carefully, so that you know you can construct similar or extended versions when needed.

4. I've also uploaded Version C of the Nils Notes (so far, 13 exercises, 13 pages). For Thu Feb 24: do the rest of Nils 9 (see my code com6a); construct an estimate and a 90 percent confidence interval for the number of skiing days in 2016, based on all data up to 2015; then do Nils Exercises 12, 13.