condition mean min max ZT0-3 2746.7 2746.7 2746.7 ZT4-7 4621.5 4621.5 4621.5 ZT8-11 5864.299999999999 5864.299999999999 5864.299999999999 ZT12-15 4261.099999999999 4261.099999999999 4261.099999999999 ZT16-19 3407.5499999999997 3407.5499999999997 3407.5499999999997 ZT20-23 4731.9 4731.9 4731.9