How many chess moves are made by Americans each year?
Answer: To estimate this we need to estimate the fraction of Americans who play chess regularly, the number of games played per year, and the number of moves per game. We are assuming we already know that the population of the U.S. is 3×108.
If we’re optimistic, we’ll say that more than 1% and less than 100% of Americans play chess regularly, giving an estimate of 10%. If we’re pessimistic, our upper bound will be only 10%, giving an estimate of 3%.
A typical chess player will play more often than once a month and less often than once a day, giving a frequency estimate of once every . A typical game will last about 30 moves (more than 10 and less than 100).
This gives the total number of chess...
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