Referring to Table 4-1, what proportion of accidents involved alcohol and a single vehicle? O 50/400 or 12.5% O 195/400 or 48.75% O 245/400 or 61.2596 25/400 or 6.25%
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
![QUESTION 17
TABLE 4-1
Mothers Against Drunk Driving is a very visible group whose main focus is to educate the public about the harm caused by
drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Four 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 Vehicles
Involved
Did alcohol play a role?
1
2.
Totals
Yes
50
100 20
170
No
25
175
30
230
Totals
75
275 50
400
Referring to Table 4-1, what proportion of accidents involved alcohol and a single vehicle?
O50/400 or 12.5%
195/400 or 48.75%
245/400 or61.25%
25/400 or 6.25%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbd90b839-7993-471f-88e3-29eddc2c4bc8%2Fb749c5cb-03fe-45ec-9173-deb16e6240fd%2Flw50raf_processed.jpeg&w=3840&q=75)
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