Question

chapter 3: 3.4 contingency tables - homework
score: 4/10 answered: 2/5
question 3
the table summarizes results from 980 pedestrian deaths that were caused by automobile accidents.

driver intoxicated?	pedestrian intoxicated?
yes	52	84
no	224	620

if one of the pedestrian deaths is randomly selected, find the probability that the driver was not intoxicated but the pedestrian was. please enter a decimal to 4 places.

Explanation:

Step1: Identify relevant values

We want the case where driver is not intoxicated and pedestrian is. The number of such cases is 224. The total number of pedestrian - deaths is 980.

Step2: Calculate probability

The probability $P$ is given by the formula $P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. So $P = \frac{224}{980}$.

Step3: Simplify and round

$\frac{224}{980}=\frac{8}{35}\approx0.2286$

Answer:

0.2286