condition mean min max ZT0-3 0.6957565 0.6022805 0.8491095 ZT4-7 0.7698805 0.7698805 0.7698805 ZT8-11 1.059352 1.059352 1.059352 ZT12-15 2.180385 1.954165 2.406605 ZT16-19 1.0502235 1.0502235 1.0502235 ZT20-23 0.7474185 0.7474185 0.7474185