Lies, damned lies and statistics

My American friends' friends adopted an Afro-Caribbean child. They were moving to Massachusetts and, not wishing their new son to feel out of place at school, trawled the census statistics to find the most ethnically diverse town which would fit their requirements. They needled in on Concord, found a house and moved in. Their son started at his new school. He was the only non-white boy there. They could see no non-whites on the streets of Concord. They raised the question with the headmaster of the school. "Oh, that's a statistical anomaly!" he said. "The 12.5% non-white population all comes from the prison which is within Concord for census purposes." Just goes to show, it's worth visiting a place/school before making decisions.