condition mean min max ZT0-3 970.148075 970.148075 970.148075 ZT4-7 577.217749 577.217749 577.217749 ZT8-11 542.4389075 542.4389075 542.4389075 ZT12-15 626.558264 626.558264 626.558264 ZT16-19 760.176475 760.176475 760.176475 ZT20-23 885.194175 885.194175 885.194175