Q1:
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It is known that the number of accidents on a motorway occur at an average of 25 every year. X is a random variable for the number of accidents.
What type of probability distribution is X?
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A. Binomial
B. Poisson
C. Normal
D. Rectangular
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Answer 1:
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Q2:
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Could the normal distribution be used as a suitable approximation for X?
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A. Yes
B. No
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Answer 2:
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Q3:
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In question 1, if the normal approximation was used, what would be the mean of the normal approximation? |
A. 5
B. 25
C. 625
D. 20
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Answer 3:
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Q4:
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In question 1, if the normal distribution was used, what would be the standard deviation of the normal approximation?
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A. 5
B. 25
C. 625
D. 20
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Answer 4:
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Q5:
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In question 1, what is the probability that there will be more than 30 accidents?
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A. 0.8333
B. 1.1
C. 0.3643
D. 0.1357
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Answer 5:
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