Chapter 1 - risk population random sample sample survey...

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CHAPTER 1 What is statistics? Statistics is a collection of procedures and principles for gathering data and analyzing information to help people make decisions when faced with uncertainty. When we have a question that needs answering, we use statistics as a method to find the answer. Statistics helps us to ask the right question, collect the right data, and make the correct conclusion. Statistics is not just about number crunching! Critical thinking skills and common sense are far more important than mathematical ability. Why use data? Data are used to make a judgment about a situation. Case Studies 1.1-1.7 Please read these to understand the following terminology: dotplot, five-number summary, data, median, lower quartile, upper quartile, rate, risk, base rate, baseline
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Unformatted text preview: risk, population, random sample, sample survey, margin of error, nonresponse bias, self-selected sample, volunteer sample, observational study, variable, confounding variable, randomized experiment, treatment, random assignment, placebo, statistically significant, practical significance and the morals as summarized on page 8 of the textbook. The Discovery of Knowledge 1. Asking the right question(s). 2. Collecting useful data which includes deciding how much is needed. 3. Summarizing and analyzing data, with the goal of answering the questions. 4. Making decisions and generalizations based on the observed data. 5. Turning the data and subsequent decisions into new knowledge....
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This note was uploaded on 02/03/2010 for the course STAT 200 at Penn State.

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