Hi Rahul,
Based on these values, can you clarify this is how you calculated to get the solution.
20.033cm, 19.982cm, 19,995cm, 20.006cm, 19.968cm, 19.963cm, 19.958cm, 19.979cm, 19.959cm.
mean/ average= 19.983 (179.843/9) add all # values/divide by sum of #'s
below the mean: 19.982, 19.963, 19.958, 19.979, 19.959
above the mean: 20.033, 19.995, 20.066
Overall, more than 5 consecutive points on one side of the average value (below the mean) Therefore, a special cause could
be investigated, and the process should be adjusted.
Thank you!
Kristin