condition mean min max ZT0-3 14.984206 14.984206 14.984206 ZT4-7 44.244046 44.244046 44.244046 ZT8-11 53.63387 53.63387 53.63387 ZT12-15 32.4041755 32.4041755 32.4041755 ZT16-19 21.5709205 21.5709205 21.5709205 ZT20-23 20.461758 20.461758 20.461758