You Conduct a Randomized Study and Find in Your Sample

question 1

Multiple Choice

You conduct a randomized study and find in your sample of patients admitted to the hospital with dementia, 31% will have a return emergency room visit within three months of discharge. National data becomes available at the end of the year, which then shows that within the full population of patients with dementia who are admitted to the hospital the actual return to ED rate within three months was 29%. You conclude:

• A) Your estimate was wrong.
• B) The difference reflects sampling error.
• C) There is a statistically significant difference in the sample and population estimates.
• D) We would expect the population value to be less than the sample value because of the larger sample.

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Definitions:

Total Capacitance

The overall capacity of an electrical circuit to store an electric charge, often measured in farads (F).

μ F

Microfarad, a unit of capacitance equal to one millionth of a farad, used to measure the storage of electrical charge.

Dielectric Stress

The molecular stress placed on a dielectric material proportional to the level of applied voltage.

Dielectric

An electric insulator.