This document describes how to use Microsoft Excel's Data Analysis tool to perform descriptive statistical analysis of a data set. It provides step-by-step instructions on activating the Data Analysis tool in Excel, selecting the Descriptive Statistics function, inputting data, and interpreting the results. Key steps include accessing the Options menu in Excel, enabling the Analysis ToolPak add-in, selecting Descriptive Statistics from the Data Analysis dialog box, inputting the data range and output options, and understanding measures like mean, median, mode, and standard deviation generated in the analysis.