The Reason for Using the T-Distribution in a Hypothesis Test

question 106

Multiple Choice

The reason for using the t-distribution in a hypothesis test about the population mean is:

• A) the population standard deviation is unknown.
• B) it results in a lower probability of a Type I error occurring.
• C) it provides a smaller critical value than the standard normal distribution for a given sample size.
• D) the population is not normally distributed.

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Definitions:

Balloon Angioplasty

A medical procedure that uses a balloon-tipped catheter to widen narrowed or blocked arteries, typically to treat cardiovascular disease.

Blocked Blood Vessels

Obstructions within the arteries or veins that impede the flow of blood through the circulatory system.

Angiography

Medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and heart chambers.

Computed Tomography

A specialized imaging technique that uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.