MATH AP-The number of cars an American family owns follows
Question # 00480378
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Updated on: 02/08/2017 07:47 AM Due on: 02/08/2017
The number of cars an American family owns follows the distribution below:
| 0.09 | 0.36 | 0.35 | 0.13 | 0.05 | 0.02 |
a) Verify that this is a legitimate probability distribution.
b) Interpret (in words) the notation P(X>2).
c) Interpret (in words) the notation P(X=2).
d) Find P(X>2)
A study of social mobility in America examined the social class attained by the sons of lower class fathers. Social classes were numbered from 1 to 5 with 1 representing the lower class and 5 the higher class. Consider the random variable X to the class of a randomly chosen son. The study found the following distribution:
| 0.48 | 0.38 | 0.08 | 0.05 | 0.01 |
a) What percent of the sons reached the highest class?
b) Check that this distribution meets the requirements of a discrete probability distribution.
c) What is P(X<2)?
d) What is P(X=2)?
e) Write the event: a son of a lower class father attains one of the highest two social classes in terms of X.
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Solution: MATH AP-The number of cars an American family owns follows