The following table represents the probability of the number of cars owned by a college student. Give your answer to at least 3 decimal places. x P(x) 0 0.47 1 0.33 2 0.12 3 0.08 a) Is this a valid discrete probability distribution?  b) Find the mean number of cars owned.   c) Find the standard deviation of the number of cars owned.

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 2E
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The following table represents the probability of the number of cars owned by a college student. Give your answer to at least 3 decimal places.

x P(x)
0 0.47
1 0.33
2 0.12
3 0.08

a) Is this a valid discrete probability distribution? 

b) Find the mean number of cars owned.  

c) Find the standard deviation of the number of cars owned. 

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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,