Five samples of table legs produced in an automated cutting process were taken each hour for 20 hours. The length of a table leg in centimeters was measured, and yielded the averages and ranges shown in Exhibit 16.10. Use these data to construct Xbar a line over the X- and R-CHarts. Assume that the sample size is 5.
Sample x R
1 95.72 1.0
2 95.24 .9
3 95.18 .8
4 95.44 .4
5 95.46 .5
6 95.32 1.1
7 95.40 .9
8 95.44 .3
9 95.08 .2
10 95.50 .6
11 95.80 .6
12 95.22 .2
13 95.56 1.3
14 95.22 .5
15 95.04 .8
16 95.72 1.1
17 94.82 .6
18 95.46 .5
19 95.60 .4
20 95.74 .6