How Might You Investigate Scientific Phenomena?
ES0205  Hypothesis Testing

Quantities that are directly related to one another exhibit similar trends on graphs. Graphing one quantity versus another can also reveal that the two are related. Examine the chart and graphs of vegetation index values and UV level. Interpret them to answer the questions below.

1986 Vegetation and UV Data X-Y Plot of Vegetation and UV Data
Line Graph of Vegetation Data by Month Line Graph of UV Data by Month

4. Describe the general relationship between vegetation index and UV level, shown in the X-Y plot of the data.

5. Describe the trends in the levels of UV level over the course of the year.

6. Based on the information presented here, would you accept or reject the hypothesis that the density of green vegetation is directly related to the amount of UV light that an area receives? Explain your answer.

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