Nine-year-old Ryan thinks through a series of steps and then mentally reverses direction, returning to the starting point. Ryan is capable of

A correlation coefficient represents two things: __________ and __________

a) a representative sample; strength b) strength; direction of the relationship c) the experimental group; control group d) direction of the relationship; expectant functionality

The axon of a neuron is often surrounded by a fatty covering called the myelin sheath

a. True b. False