If We Have a Test Called "X" and R_xx =

question 63

Multiple Choice

If we have a test called "x" and r_xx = .80, this means

• A)80% of the differences in test scores is due to error and only 20% is due to true variance.
• B)20% of the test scores were used to obtain the reliability estimate.
• C)20% of the differences in test scores is due to error and 80% is due to true variance.
• D)the test average is in the low 'B' range.

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Definitions:

Autorhythmic

Spontaneous and periodic—for example, in smooth muscle, spontaneous (without nervous or hormonal stimulation) and periodic contractions.

Cardiac Muscle

A type of involuntary striated muscle found exclusively in the heart, responsible for pumping blood throughout the body.

Skeletal Muscle

A type of striated muscle tissue that is attached to bones, enabling voluntary movement of the body through contraction and relaxation.

Smooth Muscle

A type of muscle tissue found in the walls of hollow organs (such as intestines and blood vessels) that contracts involuntarily, controlled by the autonomic nervous system.