condition mean min max ZT0-3 64.12445 53.8835 74.3654 ZT4-7 76.03115 76.03115 76.03115 ZT8-11 106.48955000000001 106.48955000000001 106.48955000000001 ZT12-15 0 0 0 ZT16-19 137.757 137.757 137.757 ZT20-23 104.7285 104.7285 104.7285