[...]... broadly viewed as a way of thinking about data and quantifying uncertainty, not a maze of numbers and messy formulas Statistics Statistics is the art and science of designing studies and analyzing the data that those studies produce Its ultimate goal is translating data into knowledge and understanding of the world around us In short, statistics is the art and science of learning from data Statistical methods... Regression Chapter 4 Gathering Data 1 1 Statistics: The Art and Science of Learning from Data 1.1 1.2 Sample Versus Population 1.3 2 Using Data to Answer Statistical Questions Using Calculators and Computers Chapter 1 Statistics: The Art and Science of Learning from Data 3 Example 1 How Statistics Helps Us Learn about the World Picture the Scenario In this book, you will explore a wide variety of everyday scenarios... consisting of at least one related person under the age of 18 The report indicated that 14.7% of white households, 30.4% of black households, and 11.1% of Asian households had annual incomes below the poverty line Based on these results, the study authors concluded that the percentage of all such black households 8 Chapter 1 Statistics: The Art and Science of Learning from Data with annual incomes below the. .. interpretations of data analyses rather from the actual calculations, the exercises often show summary statistics and printouts and ask what can be learned from them We have exercises in three places: • At the end of each section These exercises provide immediate reinforcement and are drawn from concepts within the section • At the end of each chapter This more comprehensive set of exercises draws from all... die, flipping a coin, and fluctuation of the stock market Students can select the number of times a simulation occurs, and whether they would like it animated The relative frequency of an event of interest is plotted versus the number of simulations As the number of simulations increases, the convergence of the relative frequency to the true probability of the event will be evident • The mean versus median... gathering is at the heart of investigating answers to such questions The information we gather with experiments and surveys is collectively called data For instance, consider an experiment designed to evaluate the effectiveness of a low-carbohydrate diet The data might consist of the following measurements for the people participating in the study: weight at the beginning of the study, weight at the. .. Source: Data from www.cnn.com/ELECTION/2010/results/polls/ 1 6 Chapter 1 Statistics: The Art and Science of Learning from Data year?” Similar surveys occur in other countries, such as the Eurobarometer survey within the European Union We’ll use data from such surveys to illustrate the proper application of statistical methods Reasons for Using Statistical Methods The scenarios just presented illustrate the. .. with her husband and sons In June 2012, Chris will be returning to Philmont, New Mexico, for her third trip backpacking for 11 days with both her sons and other Boy Scouts xxiv Part 1 Gathering and Exploring Data Chapter 1 Statistics: The Art and Science of Learning from Data Chapter 2 Exploring Data with Graphs and Numerical Summaries Chapter 3 Association: Contingency, Correlation, and Regression... access The population is the set of all the subjects of interest In practice, we usually have data for only some of the subjects who belong to that population These subjects are called a sample Population and Sample The population is the total set of subjects in which we are interested A sample is the subset of the population for whom we have (or plan to have) data, often randomly selected In the 2008... visualize the situation This step places the data to be investigated in context and often provides a link to previous examples • Questions to Explore reference the information from the scenario and pose questions to help students focus on what is to be learned from the example and what types of questions are useful to ask about the data Preface xv • Think It Through is the heart of each example Here, the . Statistics The Art and Science of Learning from Data This page intentionally left blank Statistics The Art and Science of Learning from Data Third Edition Alan Agresti University of. a data set interactively by clicking on a graphic that dis- plays the mean and median of the data. Using the applet lets students study the effects of shape and outliers on the mean and the. Probability, Probability Distributions, and Sampling Distributions Part Two Contents Chapter 1 Statistics: The Art and Science of Learning from Data 2 1.1 Using Data to Answer Statistical Questions