The Changing Ecology of Swamps Has Been the Subject of Much

question 122

Multiple Choice

The changing ecology of swamps has been the subject of much environmental research. One water-quality parameter of concern is the total phosphorous level. Suppose that the Ministry of the Environment makes 15 measurements in one area of the swamp, yielding a mean level of total phosphorus of 12.3 parts per billion (ppb) and a standard deviation of 5.4 ppb. The Ministry wants to test whether the data support the conclusion that the mean level is less than 15 ppb. Assume measurements are normally distributed.
-How much evidence do we have that the mean level of phosphorus is less than 15 parts per billion?

• A)No evidence
• B)Some evidence
• C)Strong evidence
• D)Very strong evidence
• E)Extremely strong evidence

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Definitions:

Health

The state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.

Maslow's Hierarchy

A theory in psychology proposed by Abraham Maslow that organizes human needs into a hierarchical structure, with basic needs at the bottom and self-actualization at the top.

Consistency

The degree to which a substance holds together; uniformity or thickness of a fluid.

Devaluing

Reducing or underestimating the importance, value, or worth of something or someone.