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.
A data frame with 54 observations on the following 4 variables:
number of defectives
trial samples (TRUE/FALSE)
Montgomery, D.C. (1991) Introduction to Statistical Quality Control, 2nd ed, New York, John Wiley & Sons, pp. 152–155.
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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
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