condition mean min max ZT0-3 261.695 261.695 261.695 ZT4-7 153.355 153.355 153.355 ZT8-11 194.8645 194.8645 194.8645 ZT12-15 156.389 156.389 156.389 ZT16-19 309.4655 309.4655 309.4655 ZT20-23 233.185 233.185 233.185