condition mean min max ZT0-3 1205.284154 1205.284154 1205.284154 ZT4-7 1423.703023 1423.703023 1423.703023 ZT8-11 1382.788894 1382.788894 1382.788894 ZT12-15 1444.9588939999999 1444.9588939999999 1444.9588939999999 ZT16-19 1448.5671705 1448.5671705 1448.5671705 ZT20-23 1415.734833 1415.734833 1415.734833