The Following Paragraph Describes an Actual Study

question 1

Essay

The following paragraph describes an actual study. After reading the description, determine whether the study is an observational study or an experiment. Justify your answer with specific references to the information in the study. "We compared paired daytime and night counts of wild brook trout, brown trout, and rainbow trout made by the same snorkelers in five streams during August 1994. Overall, we counted 109 trout in the daytime and 333 trout at night. We speculate that trout counted at night were present during the daytime but were hidden from view. Biologists should consider that trout behavior and susceptibility to being seen might vary a great deal between daytime and night, even during summer. In some streams, the majority of trout may not be seen during the daytime."

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Definitions:

Base-Year Prices

Prices from a specific base year used to express the real value of goods and services in order to remove the effects of inflation over time.

Consumer Price Index

A measure that examines the weighted average of prices of a basket of consumer goods and services, used as an indicator of inflation.

Annual Rate

A projection of a rate over a period of one year, often used in the context of interest rates, inflation, or growth rates.

Price Index

A measure showing the average level of prices for a specific set of goods and services over a period, indicating inflation or deflation.