condition mean min max ZT0-3 32.486000000000004 32.486000000000004 32.486000000000004 ZT4-7 50.02725 50.02725 50.02725 ZT8-11 51.85675 51.85675 51.85675 ZT12-15 64.4938 64.4938 64.4938 ZT16-19 59.953050000000005 59.953050000000005 59.953050000000005 ZT20-23 53.0355 53.0355 53.0355