condition mean min max ZT0-3 9.383858 9.383858 9.383858 ZT4-7 10.3106175 10.3106175 10.3106175 ZT8-11 10.7443365 10.7443365 10.7443365 ZT12-15 9.297853499999999 9.297853499999999 9.297853499999999 ZT16-19 10.981852499999999 10.981852499999999 10.981852499999999 ZT20-23 9.997566500000001 9.997566500000001 9.997566500000001