A statistics gem to tweet about and use in math class:
“In the 1960s, one hatchery paid its sexers a penny for each correctly sexed chick and deducted 35 cents for each one they got wrong. The best in the business can sex 1,200 chicks an hour with 98 to 99 percent accuracy.”
Moonwalking with Einstein: The Art and Science of Remembering Everything (p. 51) by Joshua Foer
What’s a chicken sexer? Never thought I’d learn about such a subject, until…well, I read Foer’s book. Here’s the rub. Male chickens are not as desirable on a chicken ranch as their female counterparts, but it takes roughly four to six weeks to identify the sex of a newly hatched chick. This is a costly problem on a chicken ranch.
In the 1920s, veterinarians from Japan figured out a way to tell the males from the females of day-old birds. The discovery of such a method helped ranches increase their profits. Those who graduated from the Zen-Nippon Chick Sexing School were quickly employed in the agricultural world and earned celebrity status. These so-called chicken sexers turned a handsome profit, earning as much as $500 a day, in steep contrast to the scenario above.