condition mean min max ZT0-3 74.48373333333333 74.48373333333333 74.48373333333333 ZT4-7 57.90435 57.90435 57.90435 ZT8-11 51.8054 51.8054 51.8054 ZT12-15 36.77035 36.77035 36.77035 ZT16-19 26.029600000000002 26.029600000000002 26.029600000000002 ZT20-23 32.349849999999996 32.349849999999996 32.349849999999996