Tubes for television

Description

Tubes dataframe contains data from control quality ispections of tubes for television.

Usage

data(tubes)

Format

A data frame with 20 observations on the following 2 variables.

rejects

number of rejected devices during quality ispection.

sampled

sampled devices during quality inspection.

Details

Results of twenty quality ispections are reported.

Source

Industrial data.

References

Content of this dataset can be shown by p-chart.

Examples

data(tubes)
pchart=spc(x=tubes$rejects, sg=tubes$sampled, type="p",
    name="proportion of defective tv tubes")
plot(tubes)