condition mean min max ZT0-3 1.18174425 0.7809185000000001 1.58257 ZT4-7 2.26064 2.26064 2.26064 ZT8-11 0.1303595 0.1303595 0.1303595 ZT12-15 0 0 0 ZT16-19 0.1299195 0.1299195 0.1299195 ZT20-23 1.5627149999999999 1.5627149999999999 1.5627149999999999