A Correlation of Zero Between Two Quantitative Variables Means That

question 20

Multiple Choice

A correlation of zero between two quantitative variables means that

• A) there is no association between the two variables.
• B) re-expressing the data will guarantee a linear association between the two variables.
• C) none of these
• D) there is no linear association between the two variables.
• E) we have done something wrong in our calculation of r.

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Definitions:

EMG Experiment

A diagnostic procedure involving recording and analyzing electrical activity produced by skeletal muscles.

Tonus

The state of partial contraction or tension in a resting muscle, giving it firmness and elasticity.

Hand Dynamometer

A device used to measure hand grip strength, often used in physical therapy and assessments of muscular function.

Motor Unit Recruitment

The process by which different motor units are activated to produce varying degrees of muscle strength.