4.99 How large are households?
Choose an American household at random, and let be the number of persons living in the household. If we ignore the few households with more than seven inhabitants, the probability model for is as follows:
Household size | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Probability | 0.27 | 0.33 | 0.16 | 0.14 | 0.06 | 0.03 | 0.01 |
4.99
(a) Verify that probabilities add to 1. All probabilities are between 0 and 1. (b) 0.10. (c) 0.04. (d) 0.30. (e) 0.73. (f)