condition mean min max ZT0-3 200.96425 196.6505 205.27800000000002 ZT4-7 216.785 216.785 216.785 ZT8-11 184.1355 184.1355 184.1355 ZT12-15 0 0 0 ZT16-19 246.438 246.438 246.438 ZT20-23 198.9725 198.9725 198.9725