The Expected (Mean)life of a Particular Type of Light Bulb

question 1

Multiple Choice

The expected (mean) life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed.Which most closely reflects the probability that a randomly selected bulb would last longer than 1150 hours?

• A)0.4987
• B)0.9987
• C)0.0013
• D)0.5013
• E)0.5513

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Definitions:

Childhood Schizophrenia

A rare and severe form of schizophrenia that manifests in children, characterized by hallucinations, delusions, and cognitive difficulties.

Equifinality

The principle that a given end state can be reached by many potential means and through different paths, often used in systems theory.

Psychopathology

The study of mental disorders, including their symptoms, causes, and treatment.

Multifinality

The concept in psychology that similar early experiences can lead to different outcomes in individuals.