Chapter 1 - Chapter 1 Where Do Data Come From In this...

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Chapter 1 Where Do Data Come From? In this chapter Introduction to statistics The branches of statistics Types of studies Introduction to statistics How do you define statistics ? What do you think of when you hear the term statistics ? The formal definition is as follows: Statistics - study of how to collect, organize, analyze, and interpret information Can you think of examples where you see statistics utilized? Statistics are commonly used in most fields of study and are regularly seen in newspapers, on television, and in professional work Finding examples pertinent to your interests should be quit easy. Below are a few of the many possible examples: Sports o Free throw percentage in Basketball o Quarterback rating in Football o RBI’s in Baseball o Assists in Soccer Medical o The success rates and likelihood of side effects with a weight loss drug o The percentage of people who go into remission with a type of cancer o The effect of a drug on blood pressure Education o Writing down material helps in the comprehension o Reading test scores in 1 st graders are different for males and females o Depression is more likely in a student with low academic achievement Politics o Prediction that the incumbent president will be re-elected o Approval rating of senate o Percentage of people in Kentucky who support a bill that just passed The advantage of statistics is that it gives a process for making decisions when faced with uncertainties without prejudice. This ideal will be discussed in later chapters.
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The branches of statistics We will begin this discussion with an introduction to some terminology necessary in order to distinguish between the branches. Population - the collection of individuals or items of interest Examples 1. All residents of the United States 2. All admits to hospitals in Lexington, KY Census - measurements from the entire population are used When do you see a Census utilized? A common response: every 10 years the U.S. census bureau conducts a census.
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