Hearing Is Expressed in Decibels (DB), or Units of Loudness

question 22

Multiple Choice

Hearing is expressed in decibels (dB) , or units of loudness. Which of the following is, in decibels, the softest sound a normal ear can hear?

• A)0
• B)10
• C)40 to 50
• D)100

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Definitions:

Null Hypothesis

Restated, it is the hypothesis in statistical testing that assumes no significant difference or relationship exists between specified populations, parameters, or data sets.

Statistically Insignificant

A term indicating that the observed difference or relationship in the data could have occurred by chance and does not signify a real effect.

Research Hypotheses

Specified, testable predictions about what will happen under certain conditions, often proposed as an explanation for an observable phenomenon.

Estimate Of Error

An approximation of the amount by which an observed or calculated value may differ from the true value.