condition mean min max ZT0-3 0.9288405000000001 0.9288405000000001 0.9288405000000001 ZT4-7 0.8596275 0.8596275 0.8596275 ZT8-11 0.5060805 0.5060805 0.5060805 ZT12-15 0.426362 0.426362 0.426362 ZT16-19 0.5166649999999999 0.5166649999999999 0.5166649999999999 ZT20-23 0.4663085 0.4663085 0.4663085