condition mean min max ZT0-3 458.4 458.4 458.4 ZT4-7 558.4 558.4 558.4 ZT8-11 399.7 399.7 399.7 ZT12-15 375.20000000000005 375.20000000000005 375.20000000000005 ZT16-19 507.20000000000005 507.20000000000005 507.20000000000005 ZT20-23 458.29999999999995 458.29999999999995 458.29999999999995