condition mean min max ZT0-3 5.74037 5.04542 6.435320000000001 ZT4-7 9.35341 9.35341 9.35341 ZT8-11 2.28049 2.28049 2.28049 ZT12-15 0 0 0 ZT16-19 8.935765 8.935765 8.935765 ZT20-23 9.72382 9.72382 9.72382