In 1917, a group of American psychologists administered the Binet-Simon IQ test to Europeans immigrating to the U.S. through Ellis Island. They wrote a widely-distributed report on their findings. A table from that report is displayed above.
Here’s a quote from the report’s summary:
“One can hardly escape the conviction that the intelligence of the average ‘third class’ immigrant is low, perhaps of moron grade.”
What evidence from the table lends support to the author’s conclusion?