condition mean min max ZT0-3 60.460300072500004 44.015828075 76.90477207 ZT4-7 21.952988140000002 20.40800086 23.49797542 ZT8-11 19.7873109875 18.45997947 21.114642505 ZT12-15 11.549481976500001 10.463502115499999 12.635461837500001 ZT16-19 25.51699119 18.743570769999998 32.29041161 ZT20-23 50.650639075 50.50971179 50.79156636