A Statistician Consulting for a State Department of Transportation Conducts

question 79

Multiple Choice

A statistician consulting for a state department of transportation conducts a study to see if the proportion of drivers who are intoxicated has decreased since last year.
H₀: The proportion is the same as last year
Ha: The proportion is less than last year.
The P-value of a significance test is greater than the significance level. She can conclude:

• A) there is not enough evidence to reject the null hypothesis.
• B) the test was too powerful.
• C) the null hypothesis is true.
• D) there is enough evidence to reject the null hypothesis.
• E) the alternative hypothesis is true.

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Definitions:

H.pylori

A type of bacteria that infects the stomach lining and is a leading cause of ulcers.

Ulcers

Open sores that can form on the skin, or mucous membranes of the body, often resulting in pain and discomfort.

Antibiotics

Medications used to fight infections caused by bacteria.

Carbohydrate

Organic compounds, including sugars, starches, and celluloses, which are a major source of energy for the body.