condition mean min max ZT0-3 10.0104475 9.603625000000001 10.417269999999998 ZT4-7 11.54025 11.54025 11.54025 ZT8-11 12.566099999999999 12.566099999999999 12.566099999999999 ZT12-15 0 0 0 ZT16-19 14.92375 14.92375 14.92375 ZT20-23 13.93445 13.93445 13.93445