condition mean min max ZT0-3 217.35000000000002 217.35000000000002 217.35000000000002 ZT4-7 245.1 245.1 245.1 ZT8-11 220.5 220.5 220.5 ZT12-15 289.25 289.25 289.25 ZT16-19 282.3 282.3 282.3 ZT20-23 257.55 257.55 257.55