A Traffic Safety Officer Conducted an Experiment to Determine Whether

question 49

Multiple Choice

A traffic safety officer conducted an experiment to determine whether there is a correlation between people's ages and driving speeds. Six individuals were randomly sampled and the following data were collected. The proportion of variability of Y accounted for by X is _________.

• A) 0.49
• B) 0.67
• C) 0.40
• D) - 0.49

---

Definitions:

Deltoid

A large, triangular muscle covering the shoulder joint and responsible for lifting the arm and giving it a range of motion.

Biceps Brachii

A muscle located in the upper arm responsible for flexing the elbow and supinating the forearm.

Serratus Anterior

A muscle located on the side of the thorax that aids in the movement of the shoulder blade.

Plantar Flexion

A movement that occurs when the toes are pointed downward, decreasing the angle between the foot and the leg.