condition mean min max ZT0-3 33.523925 30.3131 36.73475 ZT4-7 28.00395 28.00395 28.00395 ZT8-11 32.11855 32.11855 32.11855 ZT12-15 0 0 0 ZT16-19 37.117900000000006 37.117900000000006 37.117900000000006 ZT20-23 41.2472 41.2472 41.2472