condition mean min max ZT0-3 6.0463579355 5.739560537000001 6.353155333999999 ZT4-7 5.239166015 3.4637202580000004 7.014611772 ZT8-11 8.69494198 7.729333819000001 9.660550141 ZT12-15 5.470871744749999 4.0942316094999995 6.84751188 ZT16-19 7.4989066182499995 5.797858345 9.1999548915 ZT20-23 13.83787121 11.712305055 15.963437365