condition mean min max ZT0-3 420.6 420.6 420.6 ZT4-7 237.0 237.0 237.0 ZT8-11 225.89999999999998 225.89999999999998 225.89999999999998 ZT12-15 250.95 250.95 250.95 ZT16-19 309.4 309.4 309.4 ZT20-23 336.45 336.45 336.45