Smartphone Ownership. From the document Smartphone Ownership by the Pew Research Center and the document Current Population Survey by the U.S. Census Bureau, we constructed the following joint probability distribution for educational attainment and smartphone ownership for U.S. adults. Education Owner Yes No S1 S2 P(Ei)

Not HS grad 0.046 0.083 0.129 E1 HS grad 0.144 0.168 0.312 E2 Some college 0.101 0.067 0.168 E3 College grad 0.274 0.117 0.391 E4 P(Sj) 0.564 0.436 1.000 A U.S. adult is selected at random. Determine the probability that the person selected

a. owns a smartphone.

b. is a college grad.

c. owns a smartphone and is a college grad.

d. owns a smartphone, given that the person is a college grad.

e. is a college grad, given that the person owns a smartphone.

f. Interpret your answers in parts (a)–

(e) in terms of percentages.