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Wittaler [7]
3 years ago
6

Question 2

Business
1 answer:
mojhsa [17]3 years ago
7 0

Answer:

The answer is below

Explanation:

Probability distribution are statistical function that shows all the possible outcomes of a random variable within a given range of values.

a) The mean (\bar x) of a probability distribution of a discrete random variable is:

\bar x=\Sigma\ [xP(x)] = (0 * 0.8) + (1 * 0.15) + (2 * 0.04) + (3 * 0.01) = 0.26

b) The standard deviation (σ) of a probability distribution of a discrete random variable is:

\sigma=\sqrt{ \Sigma\ [(x-\bar x)^2*P(x)]}\\\\\sigma=\sqrt{(0-0.26)^2*0.8+(1-0.26)^2*0.15+(2-0.26)^2*0.04+(3-0.26)^2*0.01} \\\\\sigma=0.577

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