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07.03.2020 •
Mathematics
(a) Count the number of ways to select a sample of 3 people to serve on a board of directors from a population of 6 people. (b) If a simple random sampling procedure is to be employed, the chances that any particular sample will be the one selected are
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Ответ:
a) 20
b) Equally likely, 0.05
Step-by-step explanation:
We are given the following in the question:
Population size, n = 6
Sample size, r = 3
a) Ways to select a sample of 3 from a population of 6
Thus, there are 20 ways in which a sample of 3 can be selected from a population of 6.
b) The chances that any particular sample will be the one selected are equally likely.
Probability of selecting one particular sample =
Thus, 0.05 is the equally likely probability of selecting one sample.
Ответ: