This is a hard to determine figure; however, overall the average I.Q. for "Hispanics" is 92. The problem is there are differences in "Hispanics" based on origin. I don't have figures, for instance, for Cubans vs. Mexicans. Again, remember, these are group statistics and do not predict a given individual and differences between siblings average 12 I.Q. points so whatever group difference there is, is comparatively small compared to differences within a family.
Also, remember Alfred Adler's great dictum: "We are all more alike than we are differant." One of the most recent reviews of these matters was done by a British Psychologist named Brandt: he was fired for documenting the extensive data available. Arthur Jensen, a Professor at Harvard, had to have bodyguards for years for doing the same here. A Pslychologist from Florida, I believe his name was Gladny (deceased) did crime data on the basis of race and he was almost fired as well, but he died at age 61 before they could do it. The people who dispute the statistics do this on Liberal and Marxist convictions that nurture determines everything and there are no individual biological differences that are due to heredity.
The best summary of data prior to 1994 can be found in Herrnstein and Murray's The Bell Curve. There was an excellent editorial in the WSJ in 1995 or thereabouts by 300 leaders in psychology who corroborated the data from Herrnstein and Murray and went on to list a long series of conclusions that are indistubable from the known literature. The chief opponent of I.Q. testing and the finding of a "g" or general factor of intgelligence is a
Professor Gardner of the Education Department of Harvard. He believes there are "multiple intelligences" but refuses to give any hard data, correlations or anything else that could be examined from the "g" factor perspective. His theories require a "leap to faith" much like a religion. The vociferous criticisms directed at psychometrists and their findings is almost inconceivable from a rational perspective.