condition mean min max ZT0-3 85.533686 85.533686 85.533686 ZT4-7 87.0175435 87.0175435 87.0175435 ZT8-11 93.73209750000001 93.73209750000001 93.73209750000001 ZT12-15 103.2548165 103.2548165 103.2548165 ZT16-19 123.8376705 123.8376705 123.8376705 ZT20-23 114.58588 114.58588 114.58588