The Average Number of Hours for a Random Sample of Mail

question 59

Multiple Choice

The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

• A)H₀: U > 50.1, H_{a : U < 50.1.}
• B)H₀: U = 50.1, H_{a : U ≠ 50.1.}
• C)​H₀: U ≤ 50.1, H_{a : U > 50.1.}
• D)H₀: U ≥ 50.1, H_{a : U < 50.1.}

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Definitions:

Electroencephalograph

An instrument used to record the electrical activity of the brain, typically via electrodes placed on the scalp.

Brain-Wave Activity

The patterns of neuronal electrical oscillations in the brain, detectable with techniques such as EEG, and associated with different states of consciousness.

Epilepsy

A neurological disorder marked by sudden recurrent episodes of sensory disturbance, loss of consciousness, or convulsions, associated with abnormal electrical activity in the brain.

Reticular Formation

A system in the midbrain comprising a diffuse collection of neurons involved in stereotyped patterns of behavior such as walking, sleeping, and turning to attend to a sudden noise.