When those studying the brain speak of brain circuits, they are referring to

a. clusters of similar neurotransmitter-sensitive neurons.
b. physical brain structures

Measures of variability refer to the dispersion of data around the mean or the center

Indicate whether the statement is true or false

A negative correlation means that as the X values decrease, the Y values also tend to decrease

a. True b. False Indicate whether the statement is true or false