condition mean min max ZT0-3 400.0 400.0 400.0 ZT4-7 471.5 471.5 471.5 ZT8-11 640.65 640.65 640.65 ZT12-15 566.3499999999999 566.3499999999999 566.3499999999999 ZT16-19 497.9 497.9 497.9 ZT20-23 384.0 384.0 384.0