IQ is meant for population statistics. For that purpose it's a great scientific tool.

> socioeconomic status

No. A real IQ test tries to cancel out educational level from the score by comparing people in buckets of age, education and a few other importance factors.

A systematic deviation of education quality in the same "level" is not possible to cancel out, making IQ indirectly measure socioeconomic status. Hence why the us governments banned IQ on the basis or racism for government hiring.

You cannot measure two prople with 1/4th of a IQ test (logic puzzle is only one part of a full test) and make any useful statistical conclusions. A domain specific interview question or aptitude test a much clearer value to hiring prococess.

... no it isn't? IQ tests were explicitly designed as individual diagnostics. They're clinical tools.

From where did you get the idea that IQ was meant for population statistics?