The table summarizes results from 985 pedestrian deaths that were caused by automobile accidents

Question

Driver Intoxicated? Pedestrian Intoxicated? Yes No Yes 60 74 No 289 562 If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was not intoxicated. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.

Answer 1

Park, see below. Note this problem and the previous related problem you posted are fundamental statistics concepts that will absolutely be built upon throughout your class / future classes. If any part of these answers does not make perfect sense, please consider contacting me for a lesson. I am positive we can quickly review any points of potential confusion and make these concepts simple and easy to understand in a way that makes most sense to you personally. Thanks!

To find the probability that a randomly selected pedestrian death involved a pedestrian who was not intoxicated, you can use the formula:

Probability = (Number of favorable outcomes) / (Total number of outcomes)

From the table, the number of pedestrian deaths where the pedestrian was not intoxicated is 289 + 562 = 851.

The total number of pedestrian deaths is 985.

So, the probability that a randomly selected pedestrian death involved a pedestrian who was not intoxicated is:

Probability = 851 / 985

After calculating, the probability is 86.4%.

Thank you,

Benjamin M.