esson 15.A worksheet Statistical Studies: The goal of a statistical study is to
ID: 3056325 • Letter: E
Question
esson 15.A worksheet Statistical Studies: The goal of a statistical study is to learn something new through the collection and analysis of data. In designing a statistical study, one of the first decisions that needs to be madeis whether or not it is more appropriate to perform an observational study or an experimental study. An observational studyis one in which information is collected without changing the environment (i.e., nothing is manipulated). In human research, an observational study can provide information about the naturally occurring health status, behavior, attitudes or other characteristics of a particular group. Observational studies, in which the researcher interacts with the participant, may involve surveys or interviews to collect the necessary information. Observational studies in which the researcher does not interact with the participant include studies of people in an environment (e.g, "fly on the wall') and studies involving data collection using existing records (e g., medical record review). Consider the followingexample: 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 in cancer rates in these two communities, the investigator surveyed residents about their lifestyle, noted the types of businesses that were present in the community and searched 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.Explanation / Answer
(1) following are the reason that this is observational study
(2) surveyer want to know what are the difference between community A and B.
in community A: chemical plant
in Community B: departmental store
(3) yes,
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