In a Hearing Test, Randomly Selected Subjects Estimate the Loudness

question 139

Multiple Choice

In a hearing test, randomly selected subjects estimate the loudness (in decibels) of a sound, and the results are (mean = 70) : 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68. What is the variance?

• A) 18
• B) 4.73
• C) 22.40
• D) 324
• E) 6.76

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Definitions:

Distasteful Substances

Materials that are unpleasant to taste, often serving as a defense mechanism for plants and animals to avoid consumption by predators.

Camouflage

The adaptation of an organism's appearance to blend in with its environment, aiding in protection against predators.

Nerve Net

A simple nervous system found in some invertebrates, consisting of interconnected neurons with no central brain.

Nervous System

The complex network of nerves and cells that transmits signals between different parts of the body, enabling sensory perception, coordination, and response to stimuli.