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The table holds the probability distribution for the variable X, which represents the number of traffic...

The table holds the probability distribution for the variable X, which represents the number of traffic accidents in a small town (daily)

Number of Accidents Per Day (X) Probability of X, P(X)
0 .21
1 .27
2 .23
3 .12
4 .08
5 .05
6 .04

a. Calculate the probability of observing at least 1 accident per day, Pr(X ≥ 1).

b. Calculate the probability of observing 7 accidents per day, Pr(X = 7).

c. Calculate the expected number of accidents per day, E(X).

d. Calculate the standard deviation of accidents per day, σX.

math   Statistics-And-Probability   
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Answer #1

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