I If There Is Absolutely No Relationship Between Two Variables

question 129

Multiple Choice

i. If there is absolutely no relationship between two variables, what will Pearson's r equal? ii. If the coefficient of correlation is 0.80, what is the coefficient of determination?
iii. If the coefficient of determination is 0.81, what is the coefficient of correlation?

• A) zero (0); 0.64; 0.9 or -0.9.
• B) zero (0); 0.64; 0.09.
• C) one (1); 0.64; 0.6561.
• D) one (1); 0.64; 0.9 or -0.9.
• E) zero (0); 0.8944; 0.6561.

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Definitions:

Reticular Formation

A part of the brain involved in attention, sleep, and arousal.

Electrochemical

Pertaining to the processes that involve both electrical and chemical changes.

Synaptic Cleft

The small gap at a synapse between two neurons, where neurotransmitters are released to transmit signals from one neuron to another.

Chloride Ions

Negatively charged ions (Cl-) that play key roles in bodily functions such as maintaining fluid balance and transmitting nerve impulses.