Exhibit 9-4 A Random Sample of 16 Students Selected from the Student

question 116

Multiple Choice

Exhibit 9-4
A random sample of 16 students selected from the student body of a large university had an average age of 25 years. We want to determine if the average age of all the students at the university is significantly different from 24. Assume the distribution of the population of ages is normal with a standard deviation of 2 years.
-Refer to Exhibit 9-4. At a .05 level of significance, it can be concluded that the mean age is

• A)not significantly different from 24
• B)significantly different from 24
• C)significantly less than 24
• D)significantly less than 25

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Definitions:

Cardiac

Pertaining to the heart and its associated functions in the circulatory system.

Hypotonic Intravenous Solution

An IV solution with a lower concentration of solutes than the blood plasma, used to hydrate cells by moving water into the cell.

Sodium Chloride

Common table salt, a compound consisting of sodium and chloride ions, used in food and as an electrolyte in medical solutions.

Lactated Ringer's

A solution used in intravenous therapy to replenish body fluids, supply electrolytes, and provide a source of lactate in various medical situations.