condition mean min max ZT0-3 200.22966666666667 179.49099999999999 233.7875 ZT4-7 209.905 209.905 209.905 ZT8-11 189.73399999999998 189.73399999999998 189.73399999999998 ZT12-15 188.8465 183.4025 194.2905 ZT16-19 180.40800000000002 180.40800000000002 180.40800000000002 ZT20-23 154.06349999999998 154.06349999999998 154.06349999999998