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 0.48 1 0.33 2 0.12 3 0.07 a) Is this a valid...

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.

a) Is this a valid discrete probability distribution? Select an answer No, since Σ P(x) ≠ 1 and P(x) < 0 yes,="" since="" σ="" p(x)="" ≠="" 1="" and="" p(x)=""> 0 Yes, since Σ P(x) = 1 and 0 ≤ P(x) ≤ 1 No, since Σ P(x) = 1 and 0 ≤ P(x) ≤ 1

b) Find the mean number of cars owned.

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

d) Find σ2σ2 .