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 #1
avatar+118723 
+4

I don't know Mellie but I have a theory  lol

 

If the youngest 2 children get 6 each then there is 1 peice left that can got to any one of the other 3 children.

so there is 3 ways this can happen  3 ways

If the youngest 2 children get 5 peices each then the other 3 peices can be allocated as

(1,1,1 ) [1way]     (1,2,0 ) [3!=6ways]   or    (3,0,0) [3ways]   = 10 ways

If the youngest 2 children get 4 peices each then this is how the other 5 peices can be allocated

(5,0,0) [3!/2!=3 ways] (4,1,0) [3!=6 ways]  (3,2,0) [6ways]  (3,1,1)  [3ways]  (2,2,1) [3ways]  =  21 ways

If the youngest 2 children get 3 peices each then this is how the other 7 peices can be allocated

(7,0,0) 3ways (6,1,0) 6 ways(5,2,0) 6 ways (5,1,1) 3 ways (4,3,0)6 ways (4,2,1) 6 ways (3,3,1) 3 ways (3,2,2) 3 ways   =   3+6+6+3+6+6+3+3 = 36 ways

 

Now I am going out on a ledge and say that I can see a pattern forming here

3 = 3C3        10= 5C3        21= 7C3       36= 9C3        .............

So maybe if the 2 youngest get 2 peices each then there will be     11C3 = 165 ways to distribute the other 9 peies

and maybe if the 2 youngest get 1 peice each there will be   13C3 = 286 ways to distribute the other 11 peices between the other 3 children.

and if the yougest 2 get none each then there will be 15C3 = 455 ways to distribute the other 13 peices between the other 3 children.

Total = $${\mathtt{455}}{\mathtt{\,\small\textbf+\,}}{\mathtt{286}}{\mathtt{\,\small\textbf+\,}}{\mathtt{165}}{\mathtt{\,\small\textbf+\,}}{\mathtt{36}}{\mathtt{\,\small\textbf+\,}}{\mathtt{21}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}{\mathtt{\,\small\textbf+\,}}{\mathtt{3}} = {\mathtt{976}}$$    ways altogether.       

 

--------------------------------

Mmm

If this is correct, I have found that n identical peices of candy can be distribued

between 3 children $$^{(n+2)}C_3$$     It would be good if someone could walk through the logic of why this is so :/

I shall think upon it  

May 1, 2015
 #1
avatar+33661 
+5

Using the calculator at http://danielsoper.com/statcalc3/calc.aspx?id=8 and assuming n is the number of data items (so the number of degrees of freedom is n-1) we get:

 t-test

.

May 1, 2015
 #5
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May 1, 2015
 #6
avatar+118723 
0
May 1, 2015

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