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Q1:
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The random variable X has a Poisson distribution with parameter λ = 1.7.
Find P(X = 2)
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A. 0.3476
B. 0.1217
C. 0.2640
D. 0.0975 |
Answer 1:
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Q2:
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The expected value E(X) of the distribution in question 1 is: |
A. 2
B. 0.264
C. 1.7
D. 3.4 |
Answer 2:
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Q3:
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The discrete random variable X = the number of trains leaving Wellington railway station each day that are delayed.
If the average number of delayed trains is 4, what is the probability that exactly 3 trains will be late?
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A. 0.1954
B. 0.1680
C. 0.1465
D. 0.5862 |
Answer 3:
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Q4:
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What is the standard deviation of X in question 3 |
A. 4
B. 16
C. 2
D. 0.1954 |
Answer 4:
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Q5:
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What is the probability in question 3, that all trains on a particular day will leave on time? |
A. 0. 9048
B. 0.0733
C. 0
D. 0.0183 |
Answer 5:
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