The Rotating Motor-Driven Drum Used to Document the Bell Movement

question 10

Multiple Choice

The rotating motor-driven drum used to document the bell movement of a water-sealed spirometer is known as which of the following?

• A) Spirograph
• B) Kymograph
• C) Anemometer
• D) Pneumotachograph

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Definitions:

Null Hypothesis

A default position that indicates no difference or no effect, set to be tested and possibly rejected in favor of an alternative hypothesis.

Test Statistic

A value calculated from sample data during a hypothesis test used to make a decision about the null hypothesis.

Null Hypothesis

A statement of no effect or no difference, used as a starting assumption for statistical significance testing.

Grand Mean

The mean of means, calculated by taking the average of several group means.