3. Data Analysis II Flashcards

1
Q

eutrophication

A

excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.

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2
Q

covariance

A

a quantity measuring the extent of interdependence of variable quantities. unitless measurement between to variables ex. dissolved oxygen vs. chlorophyl – 0.48
Dissolved oxygen vs. Water temp – 0.54 leinnear relationships between the two variables draw the regression line.
Both are about 50%

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3
Q

standard deviation

A

is the square root of the variance

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4
Q

richness

A

when you have many different kinds of organisms

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5
Q

Three factors that affect dissolved oxygen in the water

A

Mechanical stirring, biological, and temperature (cold water holds more oxygen than warm) affects.

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6
Q

chlorophyll A

A

This is a good measure of photosynthesis

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7
Q

correlation

A

a quantity measuring the extent of interdependence of variable quantities. unitless measurement between to variables ex. dissolved oxygen vs. chlorophyl – 0.48
Dissolved oxygen vs. Water temp – 0.54 leinnear relationships between the two variables draw the regression line.
Both are about 50%

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8
Q

causation

A

the action of causing something: investigating the role of nitrate in the causation of cancer.

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9
Q

correlation is not causation

A

“Correlation is not causation” means that just because two things correlate does not necessarily mean that one causes the other. As a seasonal example, just because people in the UK tend to spend more in the shops when it’s cold and less when it’s hot doesn’t mean cold weather causes frenzied high-street spending.

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10
Q

richness

A

when you have many different kinds of organisms

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