Simple Linear Regression On Excel

1. Construct Scatterplot to see if data looks linear. Click Chart Wizard.

Select Scatter and this chart sub-type

Highlight only cells that contain the x and y values

Enter a chart title Label x and y axes

Store on a new worksheet Name the worksheet

1. Click on grey background -- Delete 2. Click on any horizontal line -- Delete 3. Click on legend -- Delete

Right mouse click on any data point. Select “Add Trendline”. Select Linear from the trendline options.

Looks linear. Return to Original Worksheet.

Go to Tools Menu Select Data Analysis

Select Regression

1. Highlight cells of y-variable 2. Highlight cells of x-variable 3. Check Labels (if first row has labels) 4. Check Confidence Level -- for other than 95% intervals (and change %) 5. Click New Worksheet Ply and give name

Low p-value Linear model OK r r 2 adj r 2 s  n SSR SSE SS TOTAL 95% Confidence interval for  1 99% Confidence interval for  1