Chapter 26 Analysis of Variance
At the Dawn of the 20th Century, More Than 10 Million Americans Toiled On Farms, More Than One-Third of the Domestic Workforce.
By 2010, farming employed just 2.2 million out of the 139 million in the workforce—less than 2%.
Huge strides in productivity made this transition possible. In 1800, it took 56 hours to farm a single acre that produced, on average, 15 bushels of wheat. (One bushel of wheat weighs 60 pounds.) By 1900, that same acre of wheat required only ...
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