condition mean min max ZT0-3 3.27367 3.27367 3.27367 ZT4-7 0.7926405 0.7926405 0.7926405 ZT8-11 2.563085 2.563085 2.563085 ZT12-15 3.794815 3.794815 3.794815 ZT16-19 3.532865 3.532865 3.532865 ZT20-23 3.6387400000000003 3.6387400000000003 3.6387400000000003