condition mean min max ZT0-3 0.19240325 0.1172995 0.267507 ZT4-7 0.4478685 0.4478685 0.4478685 ZT8-11 2.287065 2.287065 2.287065 ZT12-15 0 0 0 ZT16-19 0.9057135000000001 0.9057135000000001 0.9057135000000001 ZT20-23 0.35185 0.35185 0.35185