Each Key on a Touch-Tone Telephone Makes a Slightly Different

question 157

Multiple Choice

Each key on a touch-tone telephone makes a slightly different sound when touched.This difference is due to the pitch of sound produced by each key.The difference in pitch is determined by the _____ of the sound waves coming from each key.

• A)intensity
• B)timbre
• C)decibel
• D)frequency

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Definitions:

Observations

The act of watching carefully with attention to details for the purpose of gathering data.

Experiment

A scientific procedure undertaken to test a hypothesis by manipulating and measuring variables to observe the effect.

Independent T-tests

A statistical test that compares the means of two independent groups in order to determine if there is a statistically significant difference between them.

Statistical Difference

A significant change or discrepancy between groups or conditions that is unlikely to have occurred by chance.