condition mean min max ZT0-3 11.177708 11.177708 11.177708 ZT4-7 11.088575 11.088575 11.088575 ZT8-11 9.1729015 9.1729015 9.1729015 ZT12-15 10.4820955 10.4820955 10.4820955 ZT16-19 9.2136705 9.2136705 9.2136705 ZT20-23 10.258611 10.258611 10.258611