Question

As the US conducts its census, it determines that the maximum number people of a U.S. household is 6 in a specific Pennsylvania borough. The probability distribution of the size of a household in this Pennsylvania borough is shown below:

X	1	2	3	4	5	6
f(X)	0.01	0.43	0.36	0.12	0.07	0.01

Use this information and answer the following questions.

1.What is probability that a household in the Pennsylvania borough has 5 people?

2.What is the probability that a household in the Pennsylvania borough contains at least 4 people?

3.What is the expected number of people in a household in this Pennsylvania borough?

4. What is the standard deviation of the size of a household in this Pennsylvania borough? (use 3 decimal places)

Answer 1

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