Random Selection

[Guest]

Hello all,

I am attempting to generate a random group of names from a list and am
having a bit of trouble. In a previous posting I found the formula
=INDEX(A4:A15,INT(RAND()*(12-1)+1)), which is perfect for selecting a single
name. The trouble that I have is that I need a random sample of 20% of the
list. Copying the formula into multiple cells leaves open the chance that
any given name can be selected multiple times.

Does anyone know a way to perform this same function in subsequent cells,
while excluding previously selected names?

Thank you for your help.

Craig

 

[Guest]

One play ..

Assume Names listed in A4:A15
In B4: =RAND()
In C4: =INDEX($A$4:$A$15,RANK(B4,$B$4:$B$15))
Select B4:C4, copy down to C15. Hide away col B. C4:C15 will return a random
scramble of what's in A4:A15, refreshable via pressing the F9 key. Just point
to as many cells as you need in C4 down to grab your random x%.

 

[JE McGimpsey]

One way:

http://www.mcgimpsey.com/excel/udfs/samplenoreplace.html

 

[Guest]

Thank you both. These are tremendously helpful.

One way:

http://www.mcgimpsey.com/excel/udfs/samplenoreplace.html