15.B Worksheet Remember this situation A researcher wants to know why individual

Question

15.B Worksheet Remember this situation A researcher wants to know why individuals in Community A have a higher rate of a rare form of cancer when compared to those living in Community B. To find out the reasons for the differences their lifestyle, noted the types of businesses that were present in the community and sea medical records. The researcher found that the headquarters for the Toxico Chemical Plant is located in Community A, there is a higher rate of cigarette smoking in this community and residents tended to delay or skip going to the doctor for an annual checkup. In Community B, the largest employer was a department store and on average, residents did not smoke as much as residents from Community A. However, like individuals from Community A, Community B residents tended to delay or skip their annual checkup with their doctor. in cancer rates in these two communities, the investigator surveyed residents about rched 11) Suppose Community A was a warmer climate than Community B. How might this introduce a confounding variable that the researcher did not consider at first?

Explanation / Answer

11)A confounding variable is an outside influence that changes the effect of a dependent and independent variable. This extraneous influence is used to influence the outcome of an experimental design. Simply, a confounding variable is an extra variable entered into the equation that was not accounted for. Confounding variables can ruin an experiment and produce useless results.The climatic condition also affects the cancer rate.So the climatic condition can introduce a confounding variable because it can affect the cancer rate.Both the warm and cold climate have their effects on cancer rate.so to know why the rate of the rare form of cancer is higher in the community A than in community B we must take into account the weather or climatic condition of both the Community A and community B.

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