condition mean min max ZT0-3 370.20000000000005 370.20000000000005 370.20000000000005 ZT4-7 330.3 330.3 330.3 ZT8-11 306.65 306.65 306.65 ZT12-15 362.6 362.6 362.6 ZT16-19 362.79999999999995 362.79999999999995 362.79999999999995 ZT20-23 384.35 384.35 384.35