condition mean min max ZT0-3 39.69695 29.9395 57.7494 ZT4-7 120.8205 120.8205 120.8205 ZT8-11 33.3095 33.3095 33.3095 ZT12-15 47.50415000000001 18.36025 76.64805000000001 ZT16-19 37.4169 37.4169 37.4169 ZT20-23 23.3326 23.3326 23.3326