condition mean min max ZT0-3 110.164787 110.164787 110.164787 ZT4-7 93.8112895 93.8112895 93.8112895 ZT8-11 172.60046949999997 172.60046949999997 172.60046949999997 ZT12-15 118.2610655 118.2610655 118.2610655 ZT16-19 258.970302 258.970302 258.970302 ZT20-23 181.778502 181.778502 181.778502