These data are from a central composite design with 2 factors in 2 blocks. The design variables are in actual, not coded, form.

```
ChemReact
ChemReact1
ChemReact2
```

A data frame with 14 observations on the following 4 variables.

`Time`

a numeric vector; design variable with settings of 80, 85, and 90.

`Temp`

a numeric vector; design variable with settings of 170, 175, and 180.

`Block`

a factor with levels

`B1`

`B2`

. Block`B1`

is a first-order design with 3 center points. Block`B2`

consists of axis points and 3 more center points.`Yield`

a numeric vector; response variable: yield of the chemical process.

`ChemReact1`

and `ChemReact2`

are the separate blocks.
Each has 7 runs and three variables (`Block`

is excluded from these).