condition mean min max ZT0-3 306.582841 306.582841 306.582841 ZT4-7 306.96583 306.96583 306.96583 ZT8-11 288.1579625 288.1579625 288.1579625 ZT12-15 339.6233485 339.6233485 339.6233485 ZT16-19 284.7622225 284.7622225 284.7622225 ZT20-23 203.45034800000002 203.45034800000002 203.45034800000002