Statistics MCQ
Statistics
The random variable x is the number of vehicles that pass through an intersection in a 30 minute interval. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number of occurrences in 30 minutes is 9. What is the expected value of the random variable x?
The random variable x is the number of vehicles that pass through an intersection in a 30 minute interval. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number of occurrences in 30 minutes is 9. What is the expected value of the random variable x?
The random variable x is the number of vehicles that pass through an intersection in a 30 minute interval. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number of occurrences in 30 minutes is 9. What is the expected value of the random variable x?
a. 3
b. 2.7
c. 9
d. 30
Answer: c. 9
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