**Launch MINITAB.****Enter the data.**- Name Column C1 by clicking the column header below the label "C1" and typing, "
`x1`." Then enter the Air Flow data from the "*x*" column in Table 4.8 (p. 150)._{1i} - Name Column C2 "
`x2`" and enter the Cooling Water Inlet Temperature data from the "*x*" column in the table._{2i} - Name Column C3 "
`x1^2`" - Select
**"Calc --> Calculator."** - Fill out the resulting dialog box as follows:
Input Type Label Value **Store result in variable:**`'x1^2'`**Expression:**`'x1'**2` - CLick
**"OK."** - Name Column C4 "
`y`" and enter the Stack Loss data from the "*y*" column in Table 4.8._{i}

*Screenshot:*- Name Column C1 by clicking the column header below the label "C1" and typing, "
**Compute the multiple linear regression.**- Select
**"Stat --> Regression --> Regression."** - Fill out the resulting dialog box as follows:
Input Type Label Value **Response:**`y`**Predictors:**`x1 x2 'x1^2'` - Before closing the dialog box, click
**"Results."** - In the dialog box that follows, click the radio button next to the label,
**"In addition, the full table of fits and residuals."** - Click
**"OK"**to close the "Results" dialog box. - Click
**"Options."** - Fill out the resulting dialog box as follows:
Input Type Label Value **Weights****Fit intercept***checked***Variance inflation factors***unchecked***Pure error***unchecked***Durbin-Watson statistic***unchecked***Data subsetting***unchecked***PRESS and predicted R-square***unchecked***Prediction intervals for new observations:**`60 20 3600`**Confidence level:**`95`**Fits***unchecked***Confidence limits***unchecked***SE of fits***unchecked***Prediction limits***unchecked* - Click
**"OK"**to close the "Options" dialog box. - Click
**"OK"**in the "Regression" dialog box.

*MINITAB displays summary information, including the regression equation, a table of fits and residuals, and a predicted value for x1 = 60, x2 = 20.*- Select