orangejuice: Orange juice data

In luca-scr/qcc: Quality Control Charts

Orange juice data

Description

Frozen orange juice concentrate is packed in 6-oz cardboard cans. These cans are formed on a machine by spinning them from cardboard stock and attaching a metal bottom panel. A can is then inspected to determine whether, when filled, the liquid could possible leak either on the side seam or around the bottom joint. If this occurs, a can is considered nonconforming. The data were collected as 30 samples of 50 cans each at half-hour intervals over a three-shift period in which the machine was in continuous operation. From sample 15 used a new batch of cardboard stock was punt into production. Sample 23 was obtained when an inexperienced operator was temporarily assigned to the machine. After the first 30 samples, a machine adjustment was made. Then further 24 samples were taken from the process.

Usage

data(orangejuice)

Format

A data frame with 54 observations on the following 4 variables:

sample

sample id

D

number of defectives

size

sample sizes

trial

trial samples (TRUE/FALSE)

References

Montgomery, D.C. (1991) Introduction to Statistical Quality Control, 2nd ed, New York, John Wiley & Sons, pp. 152–155.

Examples

data(orangejuice)
orangejuice <- transform(orangejuice, d = D/size)
describe(orangejuice, by = trial)
boxplot(d ~ trial, data = orangejuice)
plot(d ~ sample, data = orangejuice, type = "b", pch = ifelse(trial, 1, 19))

luca-scr/qcc documentation built on Feb. 25, 2023, 3:33 p.m.