One-Way Analysis of Variance Example

In a one-way analysis of variance, a different mean is fit to each of the different groups, as identified by a nominal variable. To specify the model for JMP, select a continuous response column and a nominal effect column. This example uses the data in `Drug.jmp`.

1. Open the `Drug.jmp` sample data table.

2. Select `Analyze > Fit Model`.

3. Select `y` and click `Y`.

4. Select `Drug` and click `Add`.

5. Click `Run`.

In this example, `Drug` has three levels, `a`, `d`, and `f`. The standard least squares fitting method translates this specification into a linear model as follows: The nominal variables define a sequence of indicator variables, which only assume the values 1, 0, and –1. The linear model is written as follows:

where: ...

Start Free Trial

No credit card required