condition mean min max ZT0-3 9.65276 9.65276 9.65276 ZT4-7 11.5680485 11.5680485 11.5680485 ZT8-11 12.075166 12.075166 12.075166 ZT12-15 10.899038 10.899038 10.899038 ZT16-19 10.854581499999998 10.854581499999998 10.854581499999998 ZT20-23 11.431073000000001 11.431073000000001 11.431073000000001