condition mean min max ZT0-3 45.330749999999995 45.330749999999995 45.330749999999995 ZT4-7 31.06045 31.06045 31.06045 ZT8-11 27.620649999999998 27.620649999999998 27.620649999999998 ZT12-15 32.7208 32.7208 32.7208 ZT16-19 50.3514 50.3514 50.3514 ZT20-23 48.9086 48.9086 48.9086