A medical facility does MRIs for sports injuries. Occasionally a test yields inconclusive results and must be repeated. Using the following sample data and n = 192.
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|
SAMPLE
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| |
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
|
Number of retests
|
1
|
2
|
2
|
0
|
1
|
1
|
2
|
0
|
2
|
7
|
3
|
1
|
2
|
a. Determine the upper and lower control limits for the fraction of retests using two-sigma limits. (Do not round intermediate calculations. Round your final answers to 4 decimal places. Leave no cells blank - be certain to enter "0" wherever required.)
b. Is the process in control?
Yes
No