condition mean min max ZT0-3 4.465540000000001 4.465540000000001 4.465540000000001 ZT4-7 2.356525 2.356525 2.356525 ZT8-11 5.869185 5.869185 5.869185 ZT12-15 8.4096 8.4096 8.4096 ZT16-19 9.944415 9.944415 9.944415 ZT20-23 6.55318 6.55318 6.55318