Suppose the Presence of Phosphates in Certain Waste Products Dumped

question 260

Multiple Choice

Suppose the presence of phosphates in certain waste products dumped into a lake promotes the growth of algae. Rampant growth of algae affects the oxygen supply in the water, so an environmental group wishes to estimate the area of algae growth. The group measures the length across the algae growth (see the figure) and obtains the following data (in feet) .
Use 8 rectangles with bases of 10 feet and lengths measured at the left-hand endpoints to approximate the area of the algae growth. ​
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• A) 1,730 sq ft
• B) 1,704 sq ft
• C) 2,076 sq ft
• D) 2,520 sq ft
• E) 2,556 sq ft

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Definitions:

Random Assignment

A method used in experiments to evenly distribute subjects into different groups, ensuring that each group has a similar composition before the experiment begins.

Experimental Group

In research, a group of subjects who receive the treatment or variable being tested, contrasted with a control group.

Control Group

In experimental research, the group of participants that does not receive the experimental treatment, used as a benchmark to measure the effects of the treatment.

Violent TV

Television programming that contains scenes of physical force intended to hurt, damage, or kill someone or something, often criticized for its potential impact on viewers' behavior.