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.

Question

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?

Answer 1

The evidence from the table that supports the author's conclusion is that the average IQ score for third-class immigrants was lower than the average IQ score for first- and second-class immigrants. This lower average IQ score for third-class immigrants could be seen as indicating lower intelligence levels among this group compared to the other two classes.