Question

1.)

Data were collected from a survey given to graduating college seniors on the number of times they had changed majors. From that data, a probability distribution was constructed. The random variable X is defined as the number of times a graduating senior changed majors. It is shown below:

xx	0	1	2	3	4	5	6	7	8
P(X=x)P(X=x)	0.265	0.223	0.22	0.153	0.083	0.038	0.014	0.003	0.001

1. What is the probability that a randomly selected student changed his or her major at least once?
     
   
2. What is the probability that a randomly selected student changed his or her major at most twice?
     
   
3. Given that a randomly selected person did change majors, what is the probability that he or she changed majors more than three times?
     

Answer 1

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answered by: anonymous