The following data were collected on non-conformances

for a period of 10 days.
Day Sample Size Non-conformances
1 100 12
2 100 14
3 100 10
4 100 18
5 100 22
6 100 14
7 100 15
8 100 13
9 100 14
10 100 16
On what day is the proportion of non-conformances largest? smallest?
What are the LCL and UCL?
Are there any special causes of variation?

1 answer

Largest = day 5
Smallest = day 3

I searched Google under the key words "LCL UCL" to get these possible sources:

http://www.google.com/search?client=safari&rls=en&q=LCL+UCL&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.