A comparative study of organic and conventionally grown produce was checked for the presence of E. coli. Results are summarized below. Is there a significant difference in the proportion of E. Coli in organic vs. conventionally grown produce? Test at = 0.10. 
Definitions:
Volcanic Activity
The process of magma rising from the Earth's interior, leading to volcanic eruptions that release lava, ash, and gases.
Diffusion
The movement of particles from an area of higher concentration to an area of lower concentration until they are evenly distributed.
Ecological Efficiency
The efficiency with which energy is transferred from one trophic level to the next in an ecosystem. Typically only a small percentage of energy is passed on to the next level.
Trophic Level
A step in a food chain or food web, representing the position of organisms in the flow of energy through an ecosystem.
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