condition mean min max ZT0-3 4270.9 4270.9 4270.9 ZT4-7 7690.6 7690.6 7690.6 ZT8-11 6635.75 6635.75 6635.75 ZT12-15 4869.5 4869.5 4869.5 ZT16-19 4257.65 4257.65 4257.65 ZT20-23 4009.7999999999997 4009.7999999999997 4009.7999999999997