condition mean min max ZT0-3 4666.65 4666.65 4666.65 ZT4-7 4187.1 4187.1 4187.1 ZT8-11 4049.5499999999997 4049.5499999999997 4049.5499999999997 ZT12-15 4925.450000000001 4925.450000000001 4925.450000000001 ZT16-19 4420.8 4420.8 4420.8 ZT20-23 4215.25 4215.25 4215.25