More data sets and expanded index of data sets. A bundle option with more Addison-Wesley textbooks. The option to choose your text in use at the same time you enter your serial number. Students construct and modify graphs with direct manipulation, watching statistics adjust to the changes immediately. Correlation and Regression .
Students drag a line until it fits a scatterplot to understand least squares regression.
They are challenged to construct scatterplots with specified correlations to gain a conceptual feeling for correlation. Surveys and Experiments . Students learn the importance of randomness in generating valid data. They draw samples and compare their features to the parent population. Randomness and Probability .