condition mean min max ZT0-3 2331.2 2331.2 2331.2 ZT4-7 2670.8 2670.8 2670.8 ZT8-11 2668.7 2668.7 2668.7 ZT12-15 2166.3999999999996 2166.3999999999996 2166.3999999999996 ZT16-19 2050.95 2050.95 2050.95 ZT20-23 2159.4 2159.4 2159.4