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. http://krishikosh.egranth.ac.in/handle/1/2034118

### References

None.

### Examples

    data(goulden.eggs)
    dat <- goulden.eggs

    if(require(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)
    }

[Package agridat version 1.16 Index]