samples in weights 12, 6, 7, 3 and 10?
962268
The range is the largest minus the smallest, or 12-3\nmean & std dev.:\nx, f, r,rf, fr^2\n3, 1, -4, -4, 16\n4, , -3, ,\n5, , -2, ,\n6, 1, -1, -1, 1\n7, 1, 0, 0, 0\n8,  , 1, ,\n9,  , 2, ,\n10, 1, 3, +3, 9\n11 , , 4, ,\n12, 1, 5, +5, 25\nsums,,,,,,,,3, 53\nm = 7+3/5 = 7.6\nσ ≈ √(53/5) ≈ 3.2558\nTechnically, \nσ = √((4.4² + 1.6² + 0.6² + 4.6² + 2.4²/5)\nσ = 3.1369
49819
Hold on....10....20......25.....29..30....25..29\n\n25
753055
This is sampling without replacement and without regard to order.\n\nIt's given by the binomial coefficient:\n\nfor n items, choosing k at a time\n\nnCk means n choose k \n\nor \n\n    n!\n-----------  (this is a division)\n(n-k)!k!\nNote that you can get these from Pascal's triangle, nth row, kth column.\n\nSo, 4C2 is 6:\n\nAB\nBC\nCD\nDA\nAC\nBD
71734
sampler platter please
324897
Could be 10,14,13. The odd terms differ by 3 (eg. 4-1,7-4), the even terms differ by 4.
861788
There is no accurate way to do this because too many variables are involved. You can do like I do though and run a series of tests and then average them.\n\nhttp://www.toast.net/
759083
to avoid  contaminating the sample
405919
http://en.wikipedia.org/wiki/Hundred_weight
13280
14, 23, 28, 31, 43 (19)
658590
1. no\n2. 1\n3. 12\n4. 6\n5. no\n6. 25\n7, 2\n8. 90\n9. 9\n10. none\n11. don't know
160639
good 0, 3, 7, 4\n\n    bad 2, 9, 5\n\n    neutral 1, 8, 6
545123
12 to 1  less than 2 .....12 to 5 for number over a 7
653946
1 4\n2 15\n4 2\n5 100\n6 3\n7 15\n8 10\n9 10\n10 33\n11 -45\n12 2\n13 500\n14 5\n15 200
430913
ninety two thousandths\nthirty and five one hundredths\n9/125\nfour and twelve one hundredths\ntwenty four thousandths\n\nHave fun\n:)
188870
a scale or balence that uses grams
748284
copper, silver, aluminum, lead, magnesium, platinum and tungsten
200692
15,21,25,28,29,5,1,3,99,31