condition mean min max ZT0-3 436.2835 392.55449999999996 480.01250000000005 ZT4-7 338.881 338.881 338.881 ZT8-11 401.66549999999995 401.66549999999995 401.66549999999995 ZT12-15 0 0 0 ZT16-19 639.6365000000001 639.6365000000001 639.6365000000001 ZT20-23 504.8665 504.8665 504.8665