condition mean min max ZT0-3 580.47775 482.6515 678.3040000000001 ZT4-7 225.0895 225.0895 225.0895 ZT8-11 122.27099999999999 122.27099999999999 122.27099999999999 ZT12-15 0 0 0 ZT16-19 413.725 413.725 413.725 ZT20-23 300.62 300.62 300.62