Last week’s post, “A Histogram is NOT a Bar Chart ”, explained that bar charts were used for comparing categorical variables and that histograms were used to show the distributions of binned ...

Box plots are an effective way to compare distributions of interval data. To create side-by-side box plots comparing the distributions of salaries for the American and National Leagues, follow these ...

Microsoft Excel, a spreadsheet and data analysis program, is available as a stand-alone program or as a component of the Microsoft Office productivity suite. Excel 2007 included a number of new ...

Before you can interpret the results for the significant main effects you observed in the Type III Tests table, you need to examine the means for the different levels of these effects. Box plots are ...