Total No. of Questions 10] [Total No. of Pages 02
M.Sc. DEGREE EXAMINATION, MAY 2017
Second Year
STATISTICS
Statistical Quality Control
Time 3 Hours Maximum Marks: 70
Answer any Five questions.
All questions carry equal Marks.
Q1) What is Control Chart? Discuss the role of Control Charts in
manufacturing processes.
Explain the construction and operation of median and mid range Control
Charts.
Q2) Explain the construction of
-chart. Obtain its O.C. and ARL.
Explain the standard deviation Control Chart.
Q3) Explain the construction of np chart.
Write a note on natural tolerance limits and specification limits.
Q4) Explain the construction of C-Chart. Give its applications.
Explain the construction of Control Chart for fraction non-conforming.
Q5) Explain CUSUM Control Chart. How do you improve CUSUM for large
shifts?
Discuss Chi-square and T2 Control Charts.
Q6) Explain EWMA Control Chart.
Discuss the analysis of mean for variable data.
Q7) Define single sampling plan. Obtain its O.C. and ASN functions.
Describe MIL STD 105 E standard.
Q8) Explain double and sequential sampling plans. Obtain OC and ASN functions
of double sampling plan.
Explain Dodge and Romig plans.
Q9) What are the advantages and disadvantages of acceptance sampling by
variables. Explain a variable sampling plan when the standard deviation is
known.
Discuss MIL STD 414 and its use.
Q10) Explain the design of a variable sampling plan with a specified O.C. curve.
Explain continuous sampling plans.