condition mean min max ZT0-3 9.985565 9.985565 9.985565 ZT4-7 1.03904 1.03904 1.03904 ZT8-11 7.035310000000001 7.035310000000001 7.035310000000001 ZT12-15 8.203885 8.203885 8.203885 ZT16-19 26.164550000000002 26.164550000000002 26.164550000000002 ZT20-23 10.752500000000001 10.752500000000001 10.752500000000001