Lockdown number crunching with the HP Prime

[Albert Chan]

Fitting historical data is almost always perfect. (If not, just add more variables)
Predicting the future (i.e extrapolation) ... not so much.

Of course, with so many predictions proposed, some will hit it bull's eye

Nasssim Nicholas Taleb's book, "The Black Swan", page 146

Quote:The bookmakers were given the ten most useful variables, then asked to predict the outcome of [horse] races.
Then they were given ten more and asked to predict again.

The increase in the information set did not lead to an increase in their accuracy;
their confidence in their choices, on the other hand, went up markedly.

Information proved to be toxic.

These may be of interest:
https://plus.maths.org/content/covid-19
https://statisticsbyjim.com/regression/r...-too-high/
https://www.barrons.com/articles/chinas-...1581622840