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 below arranged in a frequency distribution of grouped scores. 
The cumulative frequency for the interval 6.0-6.3 is _________.
Definitions:
Antiviral Drug
Medication used specifically to treat viral infections by inhibiting the development of the offending virus.
Efficacy
The ability to produce a desired or intended result, often used in the context of medications or treatments.
Accepted Treatment
Medical procedures or therapies that are widely recognized and approved by healthcare professionals and authorities for treating specific conditions.
Ethically
Acting in ways that are morally right and in accordance with principles of conduct governing an individual or group.
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