Assuming your process is in control, use the following information to calculate
USL=1880
LSL=1720
Ybar=150
Sigma=30
Cp=0.889
Cpk=0.333
What % of the products will be rejected as they as they are larger than the upper spec limit?
What % of the products will be rejected as they as they are smaller than the lower spec limit?
If the process average is adjusted to exactly the target value (800) what % of the products will be outside USL and LSL and hence rejected?