Average Rebound Height A sample experiment Experimental Data and Calculations Sheets n / no units n = 0 Rebound Height hi / cm hi = 0.2 cm Average Rebound Height h / cm h = 2.0 cm Trial 1 Trial 2 Trial 3 54.8 55.1 54.6 55 2 53.4 52.5 49.6 52 4 50.7 48.7 48.6 49 6 49.0 47.1 48.5 48 © 2006 By Timothy K. Lund 8 45.9 45.0 44.6 45 10 39.5 41.4 42.4 41 12 35.8 34.0 35.1 35 14 31.1 33.5 33.0 33 16 29.7 27.2 29.3 29

Entering your Excel data So now that you have spent a good portion of your life gathering data, you want to present it in a graphical form that is worthy of your supreme effort. Enter your data in a new Excel spreadsheet as follows: Column A gets your x-data values. Column B gets your y-data values. Recall that h = 2 © 2006 By Timothy K. Lund Row 1 gets your - / + error Row 9 gets your + / - error

Graphing your Excel data To make your graph do the following: Highlight the first two columns (the x and y data). FYI: It is recommended that you graph your data on one graph, and your slope error on another. © 2006 By Timothy K. Lund

Graphing your Excel data With your data highlighted, go to the (dare we say it) "Chart Wizard" icon. Then choose "XY (Scatter)" in the Chart type list window: In the chart sub-type window choose the NON-CONNECTED scatter plot: © 2006 By Timothy K. Lund FYI: NEVER connect your dots. FYI: NEVER connect your dots. FYI: NEVER connect your dots. FYI: NEVER connect your dots.

Graphing your Excel data Hit the "Next >" button to Step 3 of 4. On the "Titles" tab enter the three fields as shown. © 2006 By Timothy K. Lund

Graphing your Excel data On the "Gridlines" tab choose your grid. I chose all of them on this graph, but sometimes your graphs are too crowded. © 2006 By Timothy K. Lund

Graphing your Excel data On the "Legend" tab uncheck "Show Legend." This will give your graph more space for easier reading. © 2006 By Timothy K. Lund

Graphing your Excel data Click "Next >" and then "Finish." Your graph will look something like this: © 2006 By Timothy K. Lund

Adding a best-line fit to your graph Now you will want to add a best-line fit to your graph. With your graph highlighted, choose "Chart  Add Trendline..." from the menu: © 2006 By Timothy K. Lund

Adding a best-line fit to your graph Click the "Type" tab and then choose "Linear." On the "Options" tab check the "Display equation on chart" box: Click "OK." © 2006 By Timothy K. Lund

Adding error bars to your graph DOUBLE CLICK any one of the data points. The "Format Data Series" window will open up. Choose the "Y Error Bars" tab. Pick the appropriate display... Then enter your error amount. Click "OK." © 2006 By Timothy K. Lund

Adding your slope-error lines Highlight your x-data column and your error columns as shown: The "Ctrl" key is the key to use. Your graph will look like this: © 2006 By Timothy K. Lund

Adding your slope-error lines Now insert trendlines for each data set, and include their equations. FYI: You can change the line colors, and the format/positions of the text boxes containing the equations. © 2006 By Timothy K. Lund FYI: Try SINGLE and DOUBLE clicks. FYI: Try RIGHT clicks.