Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following is a frequency distribution of speeds. 
The mean speed of the automobiles traveling on this road is closest to:
Definitions:
Per Capita GDP
A measure of the average economic output per person in a country, calculated by dividing the country's gross domestic product by its total population.
American Healthcare System
The composite of public and private institutions, insurance mechanisms, and delivery systems that provide healthcare services to the U.S. population.
Life Expectancy
The average period that a person may expect to live.
Industrial Nations
Countries that are characterized by a significant level of industrialization, with a large portion of the economy dedicated to manufacturing and services.
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