New elements, such as reference lines, can be added with the drawing tools. Regression lines Summarizing the trend of a data set with a regression line. Shows how to calculate and display the equation for the regression line and its correlation coefficient, R-squared. Merging the data from two graphs into one graph, typically to depict a second independent variable. Includes information on reformatting the graph to appropriately depict the new variable.
Descriptive statistics Provides background on mean and standard deviation.
Shows how a mean can be used to summarize data in a graph and how standard deviation can be displayed in error bars. Selecting data for display Selectively displaying only portions of your data set. Includes using graphing to identify and removing outlier points.