condition mean min max ZT0-3 379.79999999999995 379.79999999999995 379.79999999999995 ZT4-7 674.6 674.6 674.6 ZT8-11 743.1 743.1 743.1 ZT12-15 589.5 589.5 589.5 ZT16-19 563.95 563.95 563.95 ZT20-23 472.70000000000005 472.70000000000005 472.70000000000005