A population has N items. Samples of size n are selected without replacement. Find the number of possible samples.
A. 1/NCn
B. 1/nCN
C. 1/2n
D. 1/2N
Answer:A
A population has N items. Samples of size n are selected without replacement. Find the number of possible samples.
A. 1/NCn B. 1/nCN C. 1/2n D. 1/2N
Explanation: The number of ways of selecting and samples of size n from a population containing N atoms is NCn. The probability of selecting of each sample is 1/NCn.