Develop and R chart
Great Sounds Inc. produces speakers throughout North America. Great Sounds tries to produce speakers with 200 Watts of output power. To study and control the manufacturing process, 10 samples, each containing three speakers, are selected from different shifts of operations. The results are reported below
|
Sample
|
Speakers Actual output power
|
|
|
Test 1
|
Test 2
|
Test 3
|
|
1
|
200
|
202
|
204
|
|
2
|
198
|
203
|
201
|
|
3
|
201
|
200
|
199
|
|
4
|
198
|
203
|
205
|
|
5
|
198
|
200
|
203
|
|
6
|
200
|
200
|
210
|
|
7
|
199
|
199
|
202
|
|
8
|
202
|
200
|
220
|
|
9
|
210
|
215
|
200
|
|
10
|
200
|
195
|
200
|
Develop and R charts.
Do any of the selected samples seem to be out of the control limits? Describe.