Q.10. (5 pts) In a process of producing gas chromatography columns, 3 percent columns are

found to be defective. Calculate the probability of finding 4 defectives in a sample

size of 8.

Q.11. (10 pts) The following table shows the number of defective GC cartridges produced

in 30 samples containing 50 GC cartridges in each sample. Make an np-chart with

upper warning and upper action lines (7 pts), and analyze the chart (2 pts). Is this

process in statistical control (1 pt)?

2 1 2 1 0 2 3 5 1 1

4 2 0 3 1 2 2 3 3 2

4 1 1 2 0 1 2 2 4 0

Q.12. (3 pts) What are "c", "p", and "u" charts in SPC (Statistic Process Control)?