condition mean min max ZT0-3 15.525 15.0531 15.9969 ZT4-7 13.343900000000001 13.343900000000001 13.343900000000001 ZT8-11 13.68375 13.68375 13.68375 ZT12-15 0 0 0 ZT16-19 16.392 16.392 16.392 ZT20-23 16.21075 16.21075 16.21075