The calculator above will graph and output a simple linear regression model for you, along with testing the relationship and the model equation. Keep in mind that Y is your dependent variable: the one …

You can use statistical software such as Prism to calculate simple linear regression coefficients and graph the regression line it produces. For a quick simple linear regression analysis, try our free …

To extend the model to handle curves that are not symmetrical, the Richards equation adds an additional parameter, S, which quantifies the asymmetry. This equation is sometimes referred to as a …

Free web calculator provided by GraphPad Software. Calculates the P value from z, t, r, F, or chi-square.

The nonlinear regression analysis fits the data, not the graph. Since Prism lets you choose logarithmic axes, some graphs with data points that form a straight line follow nonlinear relationships.

Prism offers two forms of simple regression: simple linear regression and simple logistic regression. Although these analyses are related, we discuss them separately.

Prism is purpose-built for scientists, and when it comes to nonlinear regression, Prism is the industry favorite tool. With a consistently clear, practical, and well-documented interface, Prism gives you the …

Prism does not automatically write equations on the graph. You can see the numerical results of linear or nonlinear regression by going to the appropriate page in the Results folder.

These not only show you how to use Prism, but also review the principles of nonlinear regression, including comparing models, identifying outliers, global fitting, and more.

Switch to the Interpolated X values subpage of the Results sheet to view the “unknown” values computed on the basis of the linear regression. Prism reports the corresponding X value for each …