condition mean min max ZT0-3 21.276825000000002 18.13495 24.4187 ZT4-7 14.55655 14.55655 14.55655 ZT8-11 9.1752 9.1752 9.1752 ZT12-15 0 0 0 ZT16-19 14.087 14.087 14.087 ZT20-23 18.7414 18.7414 18.7414