goulden.eggs {agridat} | R Documentation |

##
Sample of egg weights on 24 consecutive days

### Description

Sample of egg weights on 24 consecutive days

### Usage

data("goulden.eggs")

### Format

A data frame with 240 observations on the following 2 variables.

`day`

day

`weight`

weight

### Details

Data are the weights of 10 eggs taken at random on each day for 24
days. Day 1 was Dec 10, and Day 24 was Jan 2.

The control chart for standard deviations shows 4 values beyond the
upper limits. The data reveals a single, unusually large egg on each
of these days. These are almost surely double-yolk eggs.

### Source

Cyrus H. Goulden (1952).
*Methods of Statistical Analysis*, 2nd ed. Page 425.

### References

None.

### Examples

## Not run:
library(agridat)
data(goulden.eggs)
dat <- goulden.eggs
libs(qicharts)
# Figure 19-4 of Goulden. (Goulden uses 1/n when calculating std dev)
op <- par(mfrow=c(2,1))
qic(weight, x = day, data = dat, chart = 'xbar',
main = 'goulden.eggs - Xbar chart',
xlab = 'Date', ylab = 'Avg egg weight' )
qic(weight, x = day, data = dat, chart = 's',
main = 'goulden.eggs - S chart',
xlab = 'Date', ylab = 'Std dev egg weight' )
par(op)
## End(Not run)

[Package

*agridat* version 1.18

Index]