condition mean min max ZT0-3 14.03667 14.03667 14.03667 ZT4-7 12.878188999999999 12.878188999999999 12.878188999999999 ZT8-11 11.0981355 11.0981355 11.0981355 ZT12-15 12.2682575 12.2682575 12.2682575 ZT16-19 12.168423 12.168423 12.168423 ZT20-23 12.781265000000001 12.781265000000001 12.781265000000001