condition mean min max ZT0-3 86.453 86.453 86.453 ZT4-7 76.77275 76.77275 76.77275 ZT8-11 53.62245 53.62245 53.62245 ZT12-15 43.829899999999995 43.829899999999995 43.829899999999995 ZT16-19 55.99705 55.99705 55.99705 ZT20-23 83.8587 83.8587 83.8587