If Nothing Is Known About the Shape of a Distribution

question 132

Multiple Choice

If nothing is known about the shape of a distribution, what percentage of the observations fall within 2 standard deviations of the mean?

• A) at least 75%
• B) at most 25%
• C) approximately 95%
• D) approximately 5%

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Definitions:

Autopsy

A post-mortem examination to determine the cause of death or study disease processes.

Early-onset Alzheimer's

Alzheimer's disease diagnosed before the age of 65, characterized by rapid progression and often genetic links.

Beta-amyloid Precursor Protein

A protein involved in the development of Alzheimer's disease, which, when improperly processed, leads to the formation of beta-amyloid plaques in the brain.

Presenilin Protein

A type of protein implicated in the development of Alzheimer's disease, involved in the production of amyloid beta peptides.