condition mean min max ZT0-3 474.226 474.226 474.226 ZT4-7 320.07349999999997 320.07349999999997 320.07349999999997 ZT8-11 346.70349999999996 346.70349999999996 346.70349999999996 ZT12-15 336.0175 336.0175 336.0175 ZT16-19 620.6175000000001 620.6175000000001 620.6175000000001 ZT20-23 498.61 498.61 498.61