A Researcher Wished to Evaluate the Operating Life of a Certain

question 85

Short Answer

A researcher wished to evaluate the operating life of a certain brand of storage battery. A group of 30, brand-new batteries was selected and placed in 30 identical automobiles. The lights in each automobile were then turned on (without running the engines), and the length of time before the batteries were fully discharged (lights went out) was recorded. The scores, in hours, were: 15, 10, 20, 18, 18, 11, 11, 11, 11, 12, 12, 12, 10, 9, 9, 8, 9, 9, 11, 11, 11, 15, 12, 12, 12, 10, 12, 12, 15, 12.
-Calculate the standard deviation.

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Definitions:

Word of Mouth

The passing of information from person to person through oral communication, which can have a significant impact on perceptions and behavior.

Trial and Error

A problem-solving method involving repeated, varied attempts which are continued until success, or until the agent stops trying.

Centralization Principle

A management approach where decision-making authority is concentrated in the higher levels of an organization.

Fayol's Centralization

A principle proposed by Henri Fayol that advocates for the concentration of decision-making authority at the top levels of an organization.