condition mean min max ZT0-3 87.76768333333334 80.98685 91.7217 ZT4-7 42.74105 42.74105 42.74105 ZT8-11 14.36225 14.36225 14.36225 ZT12-15 22.10445 21.09485 23.11405 ZT16-19 18.8351 18.8351 18.8351 ZT20-23 34.681749999999994 34.681749999999994 34.681749999999994