condition mean min max ZT0-3 11.464121 11.464121 11.464121 ZT4-7 13.251401000000001 13.251401000000001 13.251401000000001 ZT8-11 11.707230500000001 11.707230500000001 11.707230500000001 ZT12-15 11.4108755 11.4108755 11.4108755 ZT16-19 11.441100500000001 11.441100500000001 11.441100500000001 ZT20-23 9.5182495 9.5182495 9.5182495