condition mean min max ZT0-3 14.997527665 14.842193300000002 15.15286203 ZT4-7 13.268112793 11.010756665999999 15.525468920000002 ZT8-11 14.47674363 13.9730695 14.98041776 ZT12-15 11.878130972500001 9.794079870000001 13.962182075000001 ZT16-19 16.642965838 11.526559301 21.759372374999998 ZT20-23 30.736404145 29.030156785 32.442651505