Solution Found!
In Exercises, find the coefficient of variation for each
Chapter 3, Problem 21BSC(choose chapter or problem)
In Exercises 21–24, find the coefficient of variation for each of the two samples; then compare the variation. (The same data were used in Section 32.)
Speeding and Race Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike by race of the driver. All cars are going in the same direction, and all of the cars are from New Jersey. The data are from Statlib and the authors are Joseph Kadane and John Lamberth.
Questions & Answers
QUESTION:
In Exercises 21–24, find the coefficient of variation for each of the two samples; then compare the variation. (The same data were used in Section 32.)
Speeding and Race Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike by race of the driver. All cars are going in the same direction, and all of the cars are from New Jersey. The data are from Statlib and the authors are Joseph Kadane and John Lamberth.
ANSWER:
Solution 21BSC
For White drivers:
We know that the mean of a given set of observations obtained by adding those observations and divide that result with number of given observations. The mean speed (in mi/h) of cars on the New Jersey Turnpike is
Therefore, the mean speed of cars on the New Jersey Turnpike for white drivers is
73 mi/h.