condition mean min max ZT0-3 166.201368 166.201368 166.201368 ZT4-7 164.35692749999998 164.35692749999998 164.35692749999998 ZT8-11 124.81051099999999 124.81051099999999 124.81051099999999 ZT12-15 145.8156075 145.8156075 145.8156075 ZT16-19 166.078211 166.078211 166.078211 ZT20-23 196.842083 196.842083 196.842083