Consider the following sample data: 
For these data the sample mean is:
Definitions:
Blood
A type of bodily fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
Cardiac Muscle
A specialized form of muscle found in the heart, characterized by its ability to contract involuntarily and rhythmically.
Heart
A muscular organ in most animals, including humans, which pumps blood through the circulatory system by rhythmic contractions.
Dendrite
Branching processes of a neuron; receives stimuli and conducts potentials toward the cell body.
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