condition mean min max ZT0-3 302.2 302.2 302.2 ZT4-7 122.6 122.6 122.6 ZT8-11 171.2 171.2 171.2 ZT12-15 303.25 303.25 303.25 ZT16-19 335.0 335.0 335.0 ZT20-23 345.6 345.6 345.6