Exam 6: Probability

Drunk Drivers Six hundred accidents that occurred on a Saturday night were analyzed.Two items noted were the number of vehicles involved and whether alcohol played a role in the accident.The numbers are shown below: Number of Vehieles Involved Did aloholplay a role? 1 2 3 Totals Yes 75 125 50 250 Na 50 225 75 350 Totals 125 350 125 600 -{Drunk Drivers Narrative} What proportion of accidents involved alcohol and single vehicle?

If two events are mutually exclusive and collectively exhaustive,what is the probability that both occur?

Condo Sales and Interest Rates The probability that condo sales will increase in the next 6 months is estimated to be 0.30.The probability that the interest rates on condo loans will go up in the same period is estimated to be 0.75.The probability that condo sales or interest rates will go up during the next 6 months is estimated to be 0.90. -Posterior probability of an event is the revised probability of the event after new information is available.