6. \"Polar Bears dig the Cold,\" was an article during the summer of 2014, in wh

Question

6. "Polar Bears dig the Cold," was an article during the summer of 2014, in which the United States had substantially milder than normal daytime high temperatures. The authors collected data from a representative sample of 20 zoos across the United States by examining daytime high temperatures and closed-circuit camera footage of the number of appearances of polar bears in their enclosures. a. Was this an experiment, an observational study, or a sample survey? How do you know? b. There are two variables of interest. Which is the explanatory variable? How do you know?

Explanation / Answer

a) This is an observational study because the factors are not governed by simulation. The researcher is interested in recording the readings for different values of temperature that occur naturally.

b)

Here the explanatory variable is the daytime high temperatures. This is also called as independent variable. Here the daytime high temperature is the independent of any other variable, hence it is an explanatory variable.

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