condition mean min max ZT0-3 3.7985 3.66889 3.92811 ZT4-7 3.2045649999999997 3.2045649999999997 3.2045649999999997 ZT8-11 11.3352 11.3352 11.3352 ZT12-15 0 0 0 ZT16-19 9.985115 9.985115 9.985115 ZT20-23 7.477895 7.477895 7.477895