A census was conducted at a school. All of the students were asked how many cars their family owns. The results are below.
Pag
Question
Number of Cars
0
1
2
3
4
Probability
0.005 0.120 0.125 0.500 0.250
For the questions below enter the value only. Round to the nearest hundredth, if necessary
1. What is the probability that a randomly chosen student has 4 cars? 0.250
2. What is the probability that a randomly chosen student has less than 2 cars?
0.125
3. What is the probability that a randomly chosen student has at least 3 cars? 0.75
4. What is the expected number of cars? 2.87
5. What is the standard deviation? 0.17
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