Exhibit 9-6 A Random Sample of 16 Students Selected from the Student

question 19

Multiple Choice

Exhibit 9-6
A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university is significantly more than 24. Assume the distribution of the population of ages is normal.
-Refer to Exhibit 9-6. The test statistic is

• A)1.96
• B)2.00
• C)1.645
• D)0.05

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Definitions:

Virus

A virus is a microscopic infectious agent that replicates only inside the living cells of other organisms, potentially causing disease.

Allergic Reaction

An allergic reaction is an immune system response to a usually harmless substance, resulting in symptoms ranging from mild irritation to severe anaphylaxis.

Allergen

A substance that can cause an allergic reaction by stimulating the immune response in susceptible individuals.

Anaphylactic Shock

Severe systemic form of anaphylaxis involving bronchiolar constriction, impaired breathing, vasodilation, and a rapid drop in blood pressure with a threat of circulatory failure.