Lesson 1.pdf

# Lesson 1.pdf - Lesson 1 Displaying Data Introduction In...

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Lesson 1: Displaying Data Introduction In STAT 318 class we learned about basic probability rules as a preparation to STAT 319. In STAT 319 we will use this knowledge and learn different statistical techniques that will be useful in understanding many phenomena that you will encounter in your filed of specialization. Ø Statistics in Medicine : Compare the relief time of new medication for migraine with a standard one already in the market. Ø Statistics in Engineering: By the requirement of US Environmental Protection Agency, for performing hydrocarbon and Co 2 emission in motor vehicles. Ø Statistics in Clinical Studies : Does eating walnuts regularly lower the risk of hart attack in women? Ø Statistics in Politics : Who will be the next president of United States? Ø Statistics in Public Safety : Find out accident rates in certain intersections and watch those intersections closely. In each of the above cases, usually researchers come to you with the data and a research question in their mind. As someone with proper statistical background, you need to know how to convert this data into new knowledge. Producing Data Sometimes a primary investigator may come to you with data and a research question and ask you to analyze and interpret the new information you found in the data. This is not always the case and sometimes we might have a research question but no data to answer them. In such situations we have to produce data in a sensible way to answer those questions. If data is not properly collected, then we may not be able to answer the research questions accurately.

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Research question : Suppose we wanted to see what percentage of collage students in USA support legalizing marijuana?
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