Step 1

(A)

The sample size is, \(\displaystyle{n}={1300}\)

The number of college students who own a car is,

\(\displaystyle{x}={299}\)

The confidence level is, \(\displaystyle{C}{L}={90}\%\)

Step 2

(B)

The value of sample proportion is,

\(\displaystyle\hat{{{p}}}={\frac{{{x}}}{{{n}}}}\)

\(\displaystyle={\frac{{{299}}}{{{1300}}}}\)

\(\displaystyle={0.23}\)

The value of \(\displaystyle\hat{{{1}}}\) is,

\(\displaystyle\hat{{{q}}}={1}-\hat{{{p}}}\)

\(\displaystyle={1}-{0.23}\)

\(\displaystyle={0.77}\)