1. Excel For MATH 125 Computing Statistics

2. Useful link Surfstat: (an online text in introductory Statistics) http://surfstat.anu.edu.au/surfstat-home/surfstat-main.html

3. Computing descriptive statistics in Excel Two ways: 1.Use the formula palette – click on the f x button: This makes use of the many Excel built-in functions (Average, Stdev, Median, etc…) 2.Use the Data Analysis Toolpak & select Descriptive Statistics

4. Built-in Functions Most, if not all, of these functions are built into Excel =average(range) where range can be like C3:C40 =median(range) =percentrank(range,value) =quartile(range,which quartile) =min(range) =max(range)

5. Descriptive Statistics tool Input range: sequence of cells containing the data Label in First row Output range: tell Excel where to display the output Summary statistics: box to be checked Data: Table 1.10Table 1.10

6. Recap: Step by step: Open an Excel worksheet and paste or import a data set into a column. Click on the tab “Data Analysis”, and choose “Descriptive Statistics” Just like for Histograms: In “Input Range” enter the range or highlight your data column. In “Output Range” click on a remote cell where you want the output to appear. Check “Summary Statistics” box Click “OK”. The output will consist in several statistics, including: Mean, Median Mode, Minimum, Maximum, and Count

7. Using Excel to find the standard deviation: Step by step: Start Excel Type in a cell: =STDEV(data) That’s it! Better: Use the Data Analysis ToolPak to get full Statistics (Min, Max, Stdev, Mean, Median, etc…)