Question: How many different simple random samples of size 4 can be obtained from a population whose size is 20? Approach The 20 individuals in the

How many different simple random samples of size 4 can be obtained from a population whose size is 20?

Approach The 20 individuals in the population are distinct. In addition, the order in which individuals are selected is unimportant. Thus, the number of simple random samples of size 4 from a population of size 20 is a combination of n = 20 objects taken r = 4 at a time.

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