Sample number |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
Total |
\(\overline {X}\) |
29 |
26 |
37 |
34 |
14 |
45 |
39 |
20 |
34 |
23 |
301 |
R |
39 |
10 |
39 |
17 |
12 |
20 |
05 |
21 |
23 |
15 |
201 |
From the values of the control limits for \(\overline {X}\), we observe that one sample \(\overline {X}\) value (45) is above the UCL and one sample \(\overline {X}\) value (14) is below the LCL. Hence we conclude that the process is out of control.