A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown in the frequency distribution of grouped scores that follows. 
The percentile rank of a score of 6.5 is _________.
Definitions:
Concept
An abstract idea representing the fundamental characteristics of what it represents.
Referent
The specific entity in the world that a word or phrase identifies or stands for.
Postal Worker
A postal worker is an individual employed by the postal service to sort, process, and deliver mail to individuals and businesses.
Civil Servant
A person employed in the public sector by a government department or agency.
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