condition mean min max ZT0-3 755.854449 755.854449 755.854449 ZT4-7 809.3313015 809.3313015 809.3313015 ZT8-11 857.3472565 857.3472565 857.3472565 ZT12-15 824.404791 824.404791 824.404791 ZT16-19 783.3561315 783.3561315 783.3561315 ZT20-23 804.2082525000001 804.2082525000001 804.2082525000001