condition mean min max ZT0-3 24.740375 20.89345 28.5873 ZT4-7 18.688850000000002 18.688850000000002 18.688850000000002 ZT8-11 27.617150000000002 27.617150000000002 27.617150000000002 ZT12-15 0 0 0 ZT16-19 17.79345 17.79345 17.79345 ZT20-23 17.6362 17.6362 17.6362