A Six Sigma team is testing pilot test results to see if they have made a ststistically significant improvement.They need to test this hypothesis statistically and determine the 95% Confidence Interval for the improvement.Data from the baseline and pilot test are reported in the table below:
|
Defects
|
Good
|
Sample
|
Defect rate
|
|
Baseline
|
6290
|
613710
|
620000
|
0.01015
|
|
PILOT TEST
|
466
|
48534
|
49000
|
0.00951
|
- State the hypothesis.
- Test the hypothesis and state the results in statistical and business statements.
- State the 95% confidence interval for the baseline process defect rate in %.