condition mean min max ZT0-3 661.774057 661.774057 661.774057 ZT4-7 925.0311340000001 925.0311340000001 925.0311340000001 ZT8-11 559.493682 559.493682 559.493682 ZT12-15 507.972164 507.972164 507.972164 ZT16-19 513.5729690000001 513.5729690000001 513.5729690000001 ZT20-23 726.8273509999999 726.8273509999999 726.8273509999999