condition mean min max ZT0-3 1568.7 1568.7 1568.7 ZT4-7 2561.6 2561.6 2561.6 ZT8-11 2925.65 2925.65 2925.65 ZT12-15 2260.95 2260.95 2260.95 ZT16-19 1644.25 1644.25 1644.25 ZT20-23 1443.5 1443.5 1443.5