condition mean min max ZT0-3 9.9921085495 8.162591959 11.82162514 ZT4-7 5.344852391 5.158673138499999 5.5310316435 ZT8-11 9.95860736175 6.4707721415 13.446442582 ZT12-15 13.0817977215 12.237720767999999 13.925874675000001 ZT16-19 8.662402595749999 8.6565996895 8.668205502 ZT20-23 12.2530427175 10.92211128 13.583974155