condition mean min max ZT0-3 129.232057 129.232057 129.232057 ZT4-7 75.2244475 75.2244475 75.2244475 ZT8-11 40.3592545 40.3592545 40.3592545 ZT12-15 61.676071500000006 61.676071500000006 61.676071500000006 ZT16-19 63.011921 63.011921 63.011921 ZT20-23 72.74409750000001 72.74409750000001 72.74409750000001