condition mean min max ZT0-3 32.999233333333336 24.63185 38.56815 ZT4-7 26.135399999999997 26.135399999999997 26.135399999999997 ZT8-11 27.364649999999997 27.364649999999997 27.364649999999997 ZT12-15 49.848675 48.46575 51.2316 ZT16-19 38.93685 38.93685 38.93685 ZT20-23 41.6298 41.6298 41.6298