Drawing 3 sigma X-bar chart and R chart with given values.
What control chart(s) would you use for this data and what are the final control limits?
Observation 1 2 3 4 5 6 7 8 9 10
x1 22 20.5 20 21 22.5 23 19 21.5 21 21.5
x2 22.5 22.5 20.5 22 19.5 23.5 20 20.5 22.5 23
x3 22.5 22.5 23 22 22.5 21 22 19 20 25
x4 24 23 22 23 22.0 22 20.5 19.5 22 23
x5 23.5 21.5 21.5 22 21.0 20 22.5 19.5 22 18.5