A Eutrophic Lake

question 24

Multiple Choice

A eutrophic lake:

• A) has a high nutrient supply.
• B) is generally shallow enough so sunlight reaches the bottom.
• C) forms when sewage and phosphate detergents flow into a lake.
• D) all of these

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Definitions:

Degree of Freedom

In statistics, it refers to the number of values in the final calculation of a statistic that are free to vary.

Group Means

The average values obtained from the data points of each group or category under examination in a study.

Statistical Significance

Indicating that the observed results are unlikely to occur by chance alone, according to a predetermined threshold of probability.

Null Hypothesis

The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.