An insurance company finds that of 600 randomly selected auto accidents, teenagers were driving the vehicle in 85 of them.

(a) Find the 95% confidence interval for the proportion of auto accidents with teenaged drivers:

(, (Use 4 decimals.)

(b) What does this interval mean?

We are 95% confident that the proportion of all accidents with teenaged drivers is inside the above interval

.We are 95% confident that a randomly chosen accident with a teenaged driver will fall inside the above interval.

We are 95% confident that of the 600 sampled accidents, the proportion with a teenaged driver falls inside the above interval.

We are 95% confident that the percent of accidents with teenaged drivers is 14.2%.

(c) What does the 95% confidence level mean?

We expect that 95% of random samples of size 600 will produce

---

a true proportion

a sample proportion

confidence intervals

that contain(s) the

---

true proportion

confidence interval

sample proportion

of accidents that had teenaged drivers.

(d) A politician urging tighter restrictions on drivers' licenses issued to teens says, "One of every five auto accidents has a teenaged driver." Does the confidence interval support or contradict this statement?

The confidence interval contradicts the assertion of the politician. The figure quoted by the politician is inside the interval.

The confidence interval supports the assertion of the politician. The figure quoted by the politician is inside the interval.

The confidence interval contradicts the assertion of the politician. The figure quoted by the politician is outside the interval.

The confidence interval supports the assertion of the politician. The figure quoted by the politician is outside the interval.

rect.