Use the data on the nonconformances for a period of 10 days to complete (a) through (c).
Day Sample Size Nonconformances Day Sample Size Nonconformances Full data set
212345
100
7
12
66119
2252
28355
100
12
2
100
100
18
3
100
100
13
100
15
100
15
100
20
10
100
15
a. On what day is the proportion of nonconformances largest? smallest?
The proportion of nonconformances is the largest on day
The proportion of nonconformances is the smallest on day
b. What are the LCL and UCL?
LCL=
(Round to five decimal places as needed.)
UCL=
(Round to five decimal places as needed.)
c. Are there any special causes of variation?
☐
OA. The proportions are not within control limits. Therefore, there does appear to be at least one special cause of variation.
OB. The proportions are
within control limits. Therefore, there does not appear to be any special causes of variation.
OC. The
nonconformance varies from day to day. Therefore, there does appear to be at least one special cause of variation.
OD. The nonconformance varies from
day to day. Therefore, there does not appear to be any special causes of variation.