condition mean min max ZT0-3 312.356625 312.356625 312.356625 ZT4-7 362.655173 362.655173 362.655173 ZT8-11 342.62213099999997 342.62213099999997 342.62213099999997 ZT12-15 367.44242399999996 367.44242399999996 367.44242399999996 ZT16-19 465.076036 465.076036 465.076036 ZT20-23 445.5440345 445.5440345 445.5440345