A Researcher Wished to Evaluate the Operating Life of a Certain

question 23

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.
-For the following set of scores, calculate the standard deviation: 10, 8, 12, 3, 6, 7, 2, 10

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Definitions:

Illness Prevention

Health education programs or activities directed toward protecting patients from threats or potential threats to health and minimizing risk factors.

Hypertension

Disorder characterized by an elevated blood pressure persistently exceeding 120/80 mm Hg.

Blood Pressure

The force exerted by circulating blood upon the walls of blood vessels, measured to assess heart and vascular health.

Nursing Process

A systematic approach to nursing that involves assessment, diagnosis, planning, implementation, and evaluation to provide care.