condition mean min max ZT0-3 139.92075 122.148 157.6935 ZT4-7 74.59405 74.59405 74.59405 ZT8-11 54.26695 54.26695 54.26695 ZT12-15 0 0 0 ZT16-19 96.68690000000001 96.68690000000001 96.68690000000001 ZT20-23 105.45495 105.45495 105.45495