condition mean min max ZT0-3 10.552632500000001 9.780415000000001 11.324850000000001 ZT4-7 6.704269999999999 6.704269999999999 6.704269999999999 ZT8-11 7.634995 7.634995 7.634995 ZT12-15 0 0 0 ZT16-19 8.637045 8.637045 8.637045 ZT20-23 9.208359999999999 9.208359999999999 9.208359999999999