Random Sample


RANDOM.83p
RANDOM.86p
random.89p

Suppose we have a list of subjects that are enumerated from 1 to n. We wish to choose a random subset of size k from this group without replacement. How can we do so?



Using the RANDOM Program


To execute the RANDOM program, simply enter the number of subjects n followed by the number k that you wish to choose.

On the TI-83, the program displays the random choices and also stores the values into list L1.

On the TI-86, the program displays the random choices and also stores the values into list xStat.

On the TI-89, the program stores the random choices in the Data/Matrix Editor. Simply press APPS, then press 6, then press 1 to see the random choices under column c1.


If you wish to permute the entire set of n subjects, for instance in order to assign them randomly into blocks, then simply choose all n subjects when executing the program.



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