condition mean min max ZT0-3 34.364383333333336 25.88095 41.1594 ZT4-7 17.4289 17.4289 17.4289 ZT8-11 25.51905 25.51905 25.51905 ZT12-15 54.004575 48.465050000000005 59.5441 ZT16-19 46.408249999999995 46.408249999999995 46.408249999999995 ZT20-23 57.54575 57.54575 57.54575