condition mean min max ZT0-3 105.54333304 95.85485043 115.23181564999999 ZT4-7 92.856125015 92.799057315 92.91319271500001 ZT8-11 136.24497027500001 115.58575295 156.9041876 ZT12-15 120.038660075 111.16239569999999 128.91492445 ZT16-19 75.355113275 64.819861095 85.890365455 ZT20-23 47.0226268975 39.58238761 54.462866184999996