condition mean min max ZT0-3 97.302163 97.302163 97.302163 ZT4-7 158.712318 158.712318 158.712318 ZT8-11 234.4943305 234.4943305 234.4943305 ZT12-15 241.50157000000002 241.50157000000002 241.50157000000002 ZT16-19 128.61655050000002 128.61655050000002 128.61655050000002 ZT20-23 72.6120775 72.6120775 72.6120775