📸 GraphPad Prism XY scatter with linear regression
Why Use GraphPad for Regression Plots?
GraphPad Prism produces publication-ready regression plots with confidence bands, annotated R² and p-values, and customizable formatting that matches journal requirements. While SPSS provides the statistical output, GraphPad gives you the presentation-quality graph.
Step-by-Step in GraphPad
Step 1: New table: select XY format. Enter independent variable in X column, dependent variable in Y column.
Step 2: View the scatter plot. Click Analyze → Linear regression.
Step 3: Options: check Confidence bands (95%), Plot residuals, Report CI of slope → OK.
Step 4: GraphPad adds the regression line, 95% CI band, equation, R², and p-value to the graph automatically.
📸 GraphPad regression output — R²=.634
APA Reporting
Simple linear regression indicated that X significantly predicted Y, b=2.84 (95% CI [2.14, 3.54]), t(98)=12.41, p<.001. The model explained 63.4% of variance in Y, R²=.634, F(1, 98)=154.1, p<.001.