condition mean min max ZT0-3 1184.65 1184.65 1184.65 ZT4-7 597.1 597.1 597.1 ZT8-11 715.8499999999999 715.8499999999999 715.8499999999999 ZT12-15 751.65 751.65 751.65 ZT16-19 772.25 772.25 772.25 ZT20-23 964.95 964.95 964.95