condition mean min max ZT0-3 519.9639999999999 519.9639999999999 519.9639999999999 ZT4-7 480.06399999999996 480.06399999999996 480.06399999999996 ZT8-11 291.1575 291.1575 291.1575 ZT12-15 340.8005 340.8005 340.8005 ZT16-19 340.0575 340.0575 340.0575 ZT20-23 436.51 436.51 436.51