**Launch JMP and create a new data table.****Enter the data.**- Rename Column 1 to "
`x1`" and enter the Air Flow data from the*x*column in Table 4.8 (p. 150)._{1i} - Add a second column, "
`x2`," and enter the Cooling Water Inlet Temperature data from the*x*column in the table._{2i} - Add a third column, "
`x1^2`" - Double-click the column header,
**"x1^2."** - In the dialog box that follows, select
**"New Property --> Formula."** - Click
**"Edit Formula."** - In the dialog box that follows, double-click on the words,
**"no formula."**Enter "`:x1^2`"**Note:**When you finish editing the function, JMP will display it in a graphically-editable form. Functions can also be entered graphically using the "Table Columns" list and the arithmetic buttons. This approach is more intuitive, though more time-consuming. - Click
**"OK"**to close the function dialog box. - Click
**"OK"**in the column properties dialog box.*JMP fills the "x1^2" column with the squares of the values in "x1."* - Add a fourth column, "
`y`," and enter the Stack Loss data from the*y*column in Table 4.8._{i}

*Screenshot:*- Rename Column 1 to "
**Compute the multiple linear regression.**- Select
**"Analyze --> Fit Model."** - In the "Select Columns" list in the dialog box that follows, click
**"y"**; then click the**"Y"**button to designate y as the response variable. - Click
**"x1"**in the "Select Columns" list and click**"Add"**to designate x1 as a factor variable. Do the same for x2 and x1^2. - Select
**"Standard Least Squares"**from the pop-up menu labeled "Personality" if it is not already selected. (This should be the default.) - Select
**"Minimal Report"**from the pop-up menu labeled "Emphasis." - Leave the checkbox labeled "No Intercept" unchecked.
- Click
**"Run Model."**

*JMP computes a fit and displays summary information.*- Select
**Display confidence limits for parameters.**- Right-click anywhere on the table under the label "Parameter Estimates."
- Select
**"Columns --> Lower 95%"**from the resulting pop-up menu. - Right-click on the table again, this time selecting
**"Columns --> Upper 95%"**from the pop-up menu.

*JMP adds two columns to the Parameter Estimates table.*- Right-click anywhere on the table under the label "Parameter Estimates."
**Generate a predicted value for x**_{1}= 60, x_{2}= 20- Click the red triangle next to the label,
**"Response y."**Select**"Save Columns --> Prediction Formula"**from the resulting pop-up menu. - Again, click the red triangle next to the label,
**"Response y."**Select**"Save Columns --> StdErr Pred Formula"**from the resulting pop-up menu.*JMP saves the formulas to new columns in the data table.* - Add a new data point to the table by entering
`60`in row 18 of the "x1" column and`20`to row 18 of the "x2" column.*JMP computes a value for x1^2, a predicted y, and a standard error for the prediction.*

- Click the red triangle next to the label,