condition mean min max ZT0-3 0.11691516666666667 0.0 0.3507455 ZT4-7 0.3310495 0.3310495 0.3310495 ZT8-11 0.335201 0.335201 0.335201 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0