The Quality Control Manager at a Cell Phone Battery Factory

question 213

Multiple Choice

The quality control manager at a cell phone battery factory needs to determine whether the mean life of a large shipment of batteries is equal to the specified value of 375 hours. The process standard deviation is known to be 100 hours. A random sample of 64 batteries indicates a sample mean of 350 hours.
-The null and alternative hypotheses to test whether the shipment meets the specified value is _____.

• A)H₀: µ ≥ 350 H_a: µ < 350
• B)H₀: µ ≠ 375 H_a: µ = 375
• C)H₀: µ = 375 H_a: µ ≠ 375
• D)H₀: µ ≥ 375 H_a: µ < 375
• E)H₀: µ ≤ 375 H_a: µ > 375

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Definitions:

General Adaptation Syndrome

A three-stage physiological response to stress described by Hans Selye, consisting of alarm, resistance, and exhaustion phases.

Alarm Reaction

The initial stage of the General Adaptation Syndrome, describing the body's immediate reaction upon facing a threatening situation or stressor.

Physiological Arousal

The body's response to stimuli, resulting in increased heart rate, blood pressure, and energy preparation, often associated with stress or excitement.

Violin Solo

A musical performance piece designated for a single violinist, often accompanied by a piano, chamber group, or orchestra.