CAUSE, A town added more streetlights to several busy roads. Over the next six months, the number of nighttime accidents on those roads dropped significantly., A school began offering free breakfast before classes. Over the following year, attendance increased by 12%. A later survey found that students who regularly ate breakfast were also less likely to arrive late., A school installed speed bumps near a busy pedestrian crossing. Afterward, drivers slowed down significantly when approaching the crossing, and the number of speeding incidents in that area decreased. Since the speed bumps directly force vehicles to slow down, the school concluded that they caused the reduction in speeding., COINCIDENCE, A school introduced tablets in every classroom in September. By December, average test scores had fallen., A basketball player wore his lucky socks during four winning games. He forgot them for the next game and his team lost., Maya started listening to classical music while studying for her exams. Her grades improved that term., A soccer team changed its warm-up routine before an important tournament. The team then won seven of its next eight matches.

Coincidence or Cause?

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