Refer to the Graph, Showing Changes in Atmospheric CO₂ Concentrations

question 159

Multiple Choice

Refer to the graph, showing changes in atmospheric CO₂ concentrations in the Northern Hemisphere from 1960 to 2015. The data indicate that the overall CO₂ concentration is _______, with yearly fluctuations due to _______.

• A) variable; precipitation
• B) increasing; ocean absorption
• C) increasing; photosynthesis
• D) decreasing; precipitation
• E) decreasing; photosynthesis

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Definitions:

Standard Error

The standard deviation of a sampling distribution of a statistic, most commonly of the mean.

Coefficient Of Determination

A statistic that provides a measure of how well observed outcomes are replicated by the model, based on the proportion of total variation of outcomes explained by the model.

Coefficient Of Determination

A statistical measure represented by the symbol R², indicating the proportion of the variance in the dependent variable predictable from the independent variable(s).

Degrees Of Freedom

The number of independent values in a statistical calculation that are free to vary, often related to the number of observations in a dataset minus the number of constraints.