condition mean min max ZT0-3 1581.45 1581.45 1581.45 ZT4-7 1396.8 1396.8 1396.8 ZT8-11 1152.65 1152.65 1152.65 ZT12-15 928.0999999999999 928.0999999999999 928.0999999999999 ZT16-19 991.3499999999999 991.3499999999999 991.3499999999999 ZT20-23 1292.95 1292.95 1292.95