Bayesian supermarket
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Earlier today, Marta and I tried an exciting experiment while shopping for food. Before we got into the supermarket, we proposed that each of us (including Kobi; 6 years old) guessed how much we’d spend and then, after the first aisle, we’d look at how much we were currently spending (using the time-saver device, which displays real-time data) and revise our guess.
He didn’t really get the updating part — he started with a guess of
For the record, all the prior guesses were way off the final outcome — but in all fairness, this was mostly due to a massive outlier (1kg of coffee beans, which we hadn’t considered in our list, but was on offer — we don’t drink that much coffee…).