orangejuice: Orange juice data

In qcc: Quality Control Charts

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$d <- orangejuice$D/orangejuice$size
attach(orangejuice)
summary(orangejuice)
boxplot(d ~ trial)
mark <- ifelse(trial, 1, 2)
plot(sample, d, type="b", col=mark, pch=mark)
detach(orangejuice)

Example output

Package 'qcc' version 2.7
Type 'citation("qcc")' for citing this R package in publications.
     sample            D               size      trial               d         
 Min.   : 1.00   Min.   : 2.000   Min.   :50   Mode :logical   Min.   :0.0400  
 1st Qu.:14.25   1st Qu.: 5.000   1st Qu.:50   FALSE:24        1st Qu.:0.1000  
 Median :27.50   Median : 7.000   Median :50   TRUE :30        Median :0.1400  
 Mean   :27.50   Mean   : 8.889   Mean   :50                   Mean   :0.1778  
 3rd Qu.:40.75   3rd Qu.:12.000   3rd Qu.:50                   3rd Qu.:0.2400  
 Max.   :54.00   Max.   :24.000   Max.   :50                   Max.   :0.4800  

qcc documentation built on May 2, 2019, 9:15 a.m.