Construction of Mean also Range chart to study and control the process.
Great Sounds Inc produces speakers all through North America. Great Sounds attempts to produce speakers with 200 Watts of output power. To study also control the manufacturing process, 10 samples each containing three speakers, are selected from different shifts of operations. The outcomes 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
|
Do any of the selected samples appear to be out of the control limits? Explain.