condition mean min max ZT0-3 45.536625 42.9834 48.08985 ZT4-7 30.890900000000002 30.890900000000002 30.890900000000002 ZT8-11 30.819000000000003 30.819000000000003 30.819000000000003 ZT12-15 0 0 0 ZT16-19 37.0257 37.0257 37.0257 ZT20-23 42.6832 42.6832 42.6832