condition mean min max ZT0-3 11.45805031325 9.3982876465 13.51781298 ZT4-7 8.3238490085 7.5670473125 9.0806507045 ZT8-11 13.072128771500001 10.298790983 15.84546656 ZT12-15 16.1178381875 15.064416005 17.17126037 ZT16-19 21.001469575 19.964163220000003 22.03877593 ZT20-23 23.5162667575 21.721553325 25.31098019