condition mean min max ZT0-3 1153.721643 1153.721643 1153.721643 ZT4-7 1028.26008 1028.26008 1028.26008 ZT8-11 1267.4709695000001 1267.4709695000001 1267.4709695000001 ZT12-15 1307.762346 1307.762346 1307.762346 ZT16-19 1588.164715 1588.164715 1588.164715 ZT20-23 1319.5456245 1319.5456245 1319.5456245