tailieunhanh - Ebook Statistics - Learning prom data: Part 2

(BQ) Part 2 book "Statistics - Learning prom data" has contents: Sampling variability and sampling distributions, estimating a population proportion, asking and answering questions about a population proportion, asking and answering questions about a population mean, additional opportunities to learn from data,.and other contents. | Learning from Sample Data S ect i o n IV 342 CHAPTER 7  An Overview of Statistical Inference—Learning from Data 7 An Overview of Statistical Inference— Learning from Data Ian Dagnall/Alamy Limited Preview Chapter Learning Objectives Statistical Inference—What You Can Learn from Data Selecting an Appropriate Method—Four Key Questions Five-Step Process for A Statistical Inference Chapter Activities Are You Ready to Move On? Chapter 7 Review Exercises Preview Whether data are collected by sampling from populations or result from an experiment to compare treatments, the ultimate goal is to learn from the data. This chapter introduces the inferential process shared by all of the methods for learning from data that are covered in the chapters that follow. You will also see how the answers to four key questions guide the selection of an appropriate inference method. 342    343 chapter learning objectives Conceptual Understanding After completing this chapter, you should be able to C1  Understand the difference between questions that can be answered by using sample data to estimate population characteristics and those that can be answered by testing hypotheses about population characteristics. Understand that there is risk involved in drawing conclusions from sample data—that when generalizing C2  from sample data, the sample may not always provide an accurate picture of the population. C3  Understand that there is risk involved with drawing conclusions from experiment data—that when generalizing from experiment data, the observed difference in treatment effects may sometimes be due to variability in the response variable and the random assignment to treatments. C4  Understand that data type distinguishes between questions that involve proportions and those that involve means. C5  Know that different methods are used to draw conclusions based on categorical data and to .