condition mean min max ZT0-3 498.9 498.9 498.9 ZT4-7 416.5 416.5 416.5 ZT8-11 405.85 405.85 405.85 ZT12-15 463.4 463.4 463.4 ZT16-19 479.29999999999995 479.29999999999995 479.29999999999995 ZT20-23 464.75 464.75 464.75