Exhibit 2-7

question 25

Multiple Choice

Exhibit 2-7.Thirty students at Eastside High School took the SAT on the same Saturday.Their raw scores are given next. Refer to Exhibit 2-7.Consider a frequency distribution of the data that groups the data in classes of 1400 up to 1600,1600 up to 1800,1800 up to 2000,and so on.What graphical tool would you use to display the cumulative relative frequency of the grouped data?

• A)Ogive
• B)Polygon
• C)Pie Chart
• D)Bar Chart

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Definitions:

Low Oxygen

Conditions where the level of oxygen in an environment is below the necessary threshold to support most life forms.

Plankton

Small and often microscopic organisms that drift or float in water, forming the base of aquatic food webs.

Primary Productivity

The rate at which plants and other photosynthetic organisms produce organic compounds (such as carbohydrates) from carbon dioxide and water in the presence of sunlight, which serves as the basis for most food chains.

Photic

Pertaining to the upper layer of a body of water that is illuminated by sunlight, allowing photosynthesis to occur and supporting the majority of aquatic life.