Sample Problem 1
Table 1 shows the weight (in grams) of parts collected from a production line. In this analysis, 10 sa
a.
Compute X-Bar and R values for the samples. (2 pts.)
b.
Determine the control limits for the X-bar and R control charts. (5 pts.)
c.
Estimate the process mean and standard deviation. (5 pts.)
d.
Plot the X-bar and R charts. (5 pts.)
e.
Interpret the X-bar and R charts. (5 pts.)
Table 1
Obs 1
Obs 2
Obs 3
Obs 4
Obs 5
1
3.05
3.08
3.07
3.11
3.11
2
3.13
3.07
3.05
3.10
3.10
3
3.06
3.04
3.12
3.11
3.10
4
3.09
3.08
3.09
3.09
3.07
5
3.10
3.06
3.06
3.07
3.08
6
3.08
3.10
3.13
3.03
3.06
7
3.06
3.06
3.08
3.10
3.08
8
3.11
3.08
3.07
3.07
3.07
9
3.09
3.09
3.08
3.07
3.09
10
3.06
3.11
3.07
3.09
3.07
Sample
Number