The Chi-Square Distribution for Developing a Confidence Interval for a Standard

question 45

Multiple Choice

The chi-square distribution for developing a confidence interval for a standard deviation has degrees of freedom equal to

• A)n + 2.
• B)n +1.
• C)n.
• D)n - 1.

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Definitions:

Expectorant

A medication that helps clear mucus and other secretions from the respiratory tract, often used in treating coughs.

Mucus

A sticky, slimy substance produced by mucous membranes and glands for protection and lubrication in the body.

Airway

The path that air follows to enter and leave the lungs, including the nose, mouth, pharynx, larynx, trachea, and bronchi.

Insulin

A hormone secreted by the islets of Langerhans in the pancreas.