Enter the data into the spreadsheet. Under the columns of data calculate the standard error of the mean (standard deviation divided by the square root of the sample size), and calculate the mean. The spreadsheet with the completed graph should look something like:

Create your bar chart using the means as the bar heights. Then, right click on any of the bars and choose

Click OK and the graph should be complete. Be sure to add a title, data source, and label the axes.