condition mean min max ZT0-3 31.09885 31.09885 31.09885 ZT4-7 24.227649999999997 24.227649999999997 24.227649999999997 ZT8-11 17.34805 17.34805 17.34805 ZT12-15 16.66985 16.66985 16.66985 ZT16-19 29.14785 29.14785 29.14785 ZT20-23 32.83305 32.83305 32.83305