condition mean min max ZT0-3 48.77413333333334 23.63065 67.72710000000001 ZT4-7 20.99445 20.99445 20.99445 ZT8-11 13.544799999999999 13.544799999999999 13.544799999999999 ZT12-15 18.275525000000002 10.888349999999999 25.6627 ZT16-19 31.92975 31.92975 31.92975 ZT20-23 49.55265 49.55265 49.55265