condition mean min max ZT0-3 941.147972 941.147972 941.147972 ZT4-7 905.7858745000001 905.7858745000001 905.7858745000001 ZT8-11 1176.3704475 1176.3704475 1176.3704475 ZT12-15 1141.4141835 1141.4141835 1141.4141835 ZT16-19 1310.608001 1310.608001 1310.608001 ZT20-23 1075.162499 1075.162499 1075.162499