condition mean min max ZT0-3 1242.25 1242.25 1242.25 ZT4-7 864.9 864.9 864.9 ZT8-11 601.1 601.1 601.1 ZT12-15 585.25 585.25 585.25 ZT16-19 1003.55 1003.55 1003.55 ZT20-23 1271.7 1271.7 1271.7