condition mean min max ZT0-3 7.918164999999999 6.99114 8.845189999999999 ZT4-7 5.24982 5.24982 5.24982 ZT8-11 5.1622900000000005 5.1622900000000005 5.1622900000000005 ZT12-15 0 0 0 ZT16-19 7.12455 7.12455 7.12455 ZT20-23 5.268595 5.268595 5.268595