condition mean min max ZT0-3 11.5465 11.5465 11.5465 ZT4-7 10.96965 10.96965 10.96965 ZT8-11 10.660295000000001 10.660295000000001 10.660295000000001 ZT12-15 11.42225 11.42225 11.42225 ZT16-19 20.4105 20.4105 20.4105 ZT20-23 16.54655 16.54655 16.54655