condition mean min max ZT0-3 145.378875 145.378875 145.378875 ZT4-7 130.704327 130.704327 130.704327 ZT8-11 142.559663 142.559663 142.559663 ZT12-15 157.6157335 157.6157335 157.6157335 ZT16-19 196.511706 196.511706 196.511706 ZT20-23 200.4286055 200.4286055 200.4286055