condition mean min max ZT0-3 30.5 30.5 30.5 ZT4-7 55.0 55.0 55.0 ZT8-11 109.1 109.1 109.1 ZT12-15 256.25 256.25 256.25 ZT16-19 283.65000000000003 283.65000000000003 283.65000000000003 ZT20-23 43.75 43.75 43.75