xmp11.16 {Devore6} | R Documentation

## data from Example 11.16

### Description

The `xmp11.16` data frame has 16 rows and 6 columns of data from a blocked, 2^3 replicated factorial design.

### Format

This data frame contains the following columns:

strength
  strength of the product solution (arbitrary units).
tempture
  reactor temperature - coded as +/-1.
gas
  gas throughput - coded as +/-1.
conc
  concentration of active constituent - coded as +/-1.
block
  block in which the experiment was run.

### Source

(1951), Factorial experiments in pilot plant studies, Industrial and Engineering Chemistry, 1300–1306.

Devore, J. L. (2003) Probability and Statistics for Engineering and the Sciences (6th ed), Duxbury

### Examples

    data(xmp11.16)
    ## leave -1/+1 encoding for experimental factors, convert block
    fm1 <- aov(strength ~ tempture * gas * conc + block,
               data = xmp11.16)
    summary(fm1)     # anova table

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