condition mean min max ZT0-3 741.1967057 624.4501073 857.9433041000001 ZT4-7 241.31126055 213.3739322 269.24858889999996 ZT8-11 392.1436444 285.49509635000004 498.79219245 ZT12-15 214.8889540225 98.22648650000001 331.551421545 ZT16-19 97.42273450249999 92.42191397 102.42355503499999 ZT20-23 101.4962411075 95.010170885 107.98231133