condition mean min max ZT0-3 0.6569505 0.6569505 0.6569505 ZT4-7 0.582129 0.582129 0.582129 ZT8-11 1.114774 1.114774 1.114774 ZT12-15 1.7168 1.7168 1.7168 ZT16-19 2.748025 2.748025 2.748025 ZT20-23 0.9338985000000001 0.9338985000000001 0.9338985000000001