condition mean min max ZT0-3 0.3889275 0.305197 0.472658 ZT4-7 0.659778 0.659778 0.659778 ZT8-11 0.3496215 0.3496215 0.3496215 ZT12-15 0 0 0 ZT16-19 0.47177600000000003 0.47177600000000003 0.47177600000000003 ZT20-23 0.21515050000000002 0.21515050000000002 0.21515050000000002