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Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is μ = 45.7, and the standard deviation is σ = 12.5 years. Assuming that the distribution is normal, answer the following questions.
a. What proportion of licensed drivers are older than 50?
b. What proportion are younger than 50?
c. What is the median age?
d. What age separates the top 20% of drivers from the bottom 80%?
e. Young drivers are considered the most dangerous because they are less experienced. What proportion of drivers are between the ages of 18 and 25 - aka the "high risk" group?
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