Question

8. The following data summarizes results from 1001 pedestrian deaths that were caused by accidents. If one of the pedestrian deaths is randomly​ selected, find the probability that the pedestrian was intoxicated or the driver was intoxicated.

   Pedestrian intoxicated   Pedestrian not intoxicated
Driver intoxicated    89   62
Driver not intoxicated    272   578

​P(pedestrian was intoxicated or driver was ​intoxicated)=____

​(Round to three decimal places as​ needed.)

9. The following data lists the number of correct and wrong dosage amounts calculated by 34 physicians. In a research​ experiment, a group of 17 physicians was given bottles of epinephrine labeled with a concentration of​ "1 milligram in 1 milliliter​ solution," and another group of 17 physicians was given bottles labeled with a ratio of​ "1 milliliter of a​ 1:1000 solution." If one of the physicians is randomly​ selected, what is the probability of getting one who calculated the dose​ correctly? Is that probability as high as it should​ be?

_   Correct_Dosage_Calculation   Wrong_Dosage_Calculation
Concentration_Label   12   5
Ratio_Label   5   12

P(physician calculated the dose correctly)=_____

​(Round to three decimal places as​ needed.)

Answer 1

8. P(​pedestrian was intoxicated or driver was ​intoxicated) $= \frac{89 + 62+272 }{1001}$ $= \frac{425}{1001}$  

$= 0.423$

9.P(physician calculated the dose correctly) = $= \frac{12+ 5}{34} = 0.5$