Under a Normal Distribution,what Proportion of Observations Fall Within Two

question 37

Multiple Choice

Under a normal distribution,what proportion of observations fall within two standard deviations of the mean?

• A) 50%
• B) 68%
• C) 75%
• D) 95%

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Definitions:

Hypothesis Test

A statistical method that uses sample data to evaluate a hypothesis about the properties of a population.

P-value

The likelihood of achieving test outcomes that are as significant or more so than the observed results, assuming the null hypothesis is true.

Gadd Severity Index

A scoring system used to measure the severity of single or multiple injuries, often used in the context of road traffic accidents.

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Helmets designed with an internal suspension system that helps absorb shock and reduce impact forces to the head during collisions or falls.