Exhibit 12-2 Last School Year, the Student Body of a Local University

question 78

Multiple Choice

Exhibit 12-2
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification. We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
-Refer to Exhibit 12-2. The expected number of freshmen is

• A)83
• B)90
• C)30
• D)10

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Definitions:

Natural Cement

A type of cement that naturally forms from the chemical reaction of limestone with clay minerals under specific conditions.

Pores

Small openings on a surface, which allow for the passage of gases, liquids, or microscopic particles.

Permeability

A measure of how easily fluids can pass through a porous material or rock.

Compact Sediment

Compact sediment refers to sediment that has been compressed over time due to overlying pressure, reducing its porosity and increasing its density.