# Dyestuff

##### Yield of dyestuff by batch

The `Dyestuff`

data frame provides the yield of dyestuff
(Naphthalene Black 12B) from 5 different preparations from each of 6
different batchs of an intermediate product (H-acid). The
`Dyestuff2`

data were generated data in the same structure but
with a large residual variance relative to the
batch variance.

- Keywords
- datasets

##### Usage

`data(Dyestuff)`

##### Details

The `Dyestuff`

data are described in Davies and Goldsmith (1972)
as coming from

The `Dyestuff2`

data are described in Box and Tiao (1973) as
illustrating

##### source

O.L. Davies and P.L. Goldsmith (eds), *Statistical Methods in
Research and Production, 4th ed.*, Oliver and Boyd, (1972), section
6.4

G.E.P. Box and G.C. Tiao, *Bayesian Inference in Statistical
Analysis*, Addison-Wesley, (1973), section 5.1.2

##### Examples

```
str(Dyestuff)
dotplot(reorder(Batch, Yield) ~ Yield, Dyestuff,
ylab = "Batch", jitter.y = TRUE, aspect = 0.3,
type = c("p", "a"))
dotplot(reorder(Batch, Yield) ~ Yield, Dyestuff2,
ylab = "Batch", jitter.y = TRUE, aspect = 0.3,
type = c("p", "a"))
(fm1 <- lmer(Yield ~ 1|Batch, Dyestuff))
(fm2 <- lmer(Yield ~ 1|Batch, Dyestuff2))
```

*Documentation reproduced from package lme4, version 0.999375-28, License: GPL (>=2)*