condition mean min max ZT0-3 0.6927065 0.6508795 0.7345335 ZT4-7 0.907416 0.907416 0.907416 ZT8-11 1.07281 1.07281 1.07281 ZT12-15 0 0 0 ZT16-19 0.98289 0.98289 0.98289 ZT20-23 0.953327 0.953327 0.953327