condition mean min max ZT0-3 12.519376 12.519376 12.519376 ZT4-7 11.896370000000001 11.896370000000001 11.896370000000001 ZT8-11 15.791178 15.791178 15.791178 ZT12-15 14.204553 14.204553 14.204553 ZT16-19 13.1199665 13.1199665 13.1199665 ZT20-23 10.2475725 10.2475725 10.2475725