34 subgroups with defect counts (yi) and sample sizes (ni) for
moonroof installation. This data set is used for \(u\)-chart examples.
Format
A data frame with 34 observations on the following 4 variables.
- i
Index.
- yi
The number of defects.
- ni
The sample size.
- ui
The proportion of defects.
Source
DeVor, R. E., Chang, T., and Sutherland, J. W. (2007). Statistical Quality Design and Control, 2nd ed. Pearson.
Examples
data(moonroof)