condition mean min max ZT0-3 12.3524 12.3155 12.3893 ZT4-7 8.196245000000001 8.196245000000001 8.196245000000001 ZT8-11 11.005749999999999 11.005749999999999 11.005749999999999 ZT12-15 0 0 0 ZT16-19 10.4431 10.4431 10.4431 ZT20-23 10.409199999999998 10.409199999999998 10.409199999999998