A personal computer manufacturer counts the number of nonconformities per unit on the final assembly line. He collects data on 20 samples of 5 computers each.
Format
A data frame with 20 observations on the following 3 variables.
- x
A quantitative variable that measures the number of nonconformities in each sample.
- sample
Sample ID
- size
Number of computers inspected.
References
Montgomery, D.C. (1991) Introduction to Statistical Quality Control, 2nd ed, New York, John Wiley & Sons, pp. 181--182
Examples
data(pcmanufact)
summary(pcmanufact)
#> x sample size
#> Min. : 5.00 Min. : 1.00 Min. :5
#> 1st Qu.: 7.00 1st Qu.: 5.75 1st Qu.:5
#> Median :10.00 Median :10.50 Median :5
#> Mean : 9.65 Mean :10.50 Mean :5
#> 3rd Qu.:11.25 3rd Qu.:15.25 3rd Qu.:5
#> Max. :16.00 Max. :20.00 Max. :5
plot(pcmanufact$x/pcmanufact$size, type="b")
