Homework Log
Statistics 365
Statistical Process Control
Spring 98
Class 26 (April 30, 1998)
Review for Final Exam
- The final exam is May 7 at 5:00 p.m.
Class 25 (April 28, 1998)
Enumerative vs. Analytic Techniques
- Go over the review exercises at the end of the third
class notes package
Class 24 (April 23, 1998)
Introduction to Design of Experiments
- Do the problems on the pages "Design Homework-x"
at the end of the Design of Experiment class notes. Be prepared to discuss
your answers in the next class.
Class 23 (April 21, 1998)
Components of Variance (Cont.)
Class 22 (April 16, 1998)
Components of Variance
- Do the problems on the pages "VC Homework-x"
at the end of the Components of Variance class notes. Be prepared to discuss
your answers in the next class.
Class 21 (April 14, 1998)
Dicussion of "Slug" data.
More Measurement Issues
Class 20 (April 9, 1998)
Measurement Issues. "Slug" Experiment
- Do the problems on the page "Measurement Homework-1"
at the end of this lecture's class notes. Be prepared to discuss your answers
in the next class.
- Do the problems on the page "Slug Data-1" at
the end of this lecture's class notes. Be prepared to discuss your answers
in the next class.
- The measurements on the same slug taken in class resulted
in the following numbers (in thousandth of an inch):
- 874.5, 874.0, 874.2, 874.1, 874.0, 874.2, 874.1, 874.2
- The measurement for the thirteen subgroups of three slugs
sampled in class were (in thousandth of an inch):
- 872.0, 873.9, 876.0
- 870.5, 870.7, 873.9
- 873.2, 875.0, 875.5
- 871.1, 875.0, 877.1
- 869.8, 873.4, 875.5
- 873.2, 872.6, 876.5
- 875.0, 872.2, 873.3
- 871.1, 876.2, 875.1
- 871.1, 873.0, 875.1
- 875.2, 876.0, 871.1
- 872.5, 871.8, 876.2
- 876.0, 868.5, 872.2
- 874.2, 875.0, 872.0
- The final report of the class
project is due Thursday, April 16
Class 19 (April 7, 1998)
Statistical Tolerancing (Continued)
- Do the problems on the pages "Worst Case v. Stat
Tol-5,6" at the end of this lecture's class notes. Be prepared to
discuss your answers in the next class.
- The final report of the class
project is due Thursday, April 16
Class 18 (April 2, 1998)
Statistical Tolerancing
- Do the problems on the pages "Stat Tol HW-x"
at the end of this lecture's class notes. Be prepared to discuss your answers
in the next class.
Class 17 (March 31, 1998)
Moving Average and Range Charts,
Modified Control Chart
- Do the problems on the pages "Modified C. C. Homework
x" at the end of this lecture's class notes. Be prepared to discuss
your answers in the next class.
Class 16 (March 19, 1998)
X Charts with a Moving Range
- Do the problems on the pages "X-Chart Homework-x"
at the end of this lecture's class notes. Be prepared to discuss your answers
in the next class.
(March 12, 1998)
Review
- Exam 2 is on Tuesday, March 17
Class 15 (March 10, 1998)
Capability Indices
- Calculate Cp and Cpk indices for parts b, c, and d of
"Estimating % Out HW"
- Notice that Exam 2 is on Tuesday, March 17
Class 14 (March 5, 1998)
Process Capability. How and When to Estimate % out of Specifications
- Do the problem on the page "Estimating % Out HW-1"
of your class notes. Be prepared to discuss your answer in the next class.
- Notice that Exam 2 is on Tuesday, March 17
Class 13 (March 3, 1998)
Rational Subgrouping (continued)
- Read the "Data Entry" case study at the end
of the class lecture. Be prepared to discuss it in class on Thursday, March
5.
Class 12 (February 26, 1998)
Discussion of Poker Chip Data, Rational Subgroups
- Read the class notes on the poker chip experiment and
on rational subgroups with extreme care. The concepts are hard to grasp
but very important.
Class 11 (February 24, 1998)
Histograms,
Discussion of Formula for X-bar Chart,
Poker Chip Experiment
- In class we drew five samples from the Blue Machine to
complete twenty samples of size six from the Blue Machine. Do an R and
(if appropriate) an X-bar chart. Finish the histogram for X and X-bar.
If appropriate estimate the mean and standard deviation of X. The five
samples selected in class were:
- 18, 20, 20, 20, 18, 17
- 19, 22, 20, 24, 20, 17
- 19, 20, 22, 17, 17, 23
- 19, 22, 16, 18, 22, 19
- 20, 19, 19, 19, 14, 21
- In class we drew five samples from the White Machine
to complete twenty samples of size six from the White Machine. Do an R
and (if appropriate) an X-bar chart. Finish the histogram for X and X-bar.
If appropriate estimate the mean and standard deviation of X. The five
samples selected in class were:
- 36, 34, 35, 33, 34, 36
- 35, 37, 30, 36, 38, 34
- 36, 40, 33, 33, 35, 31
- 35, 35, 32, 33, 35, 39
- 34, 33, 34, 41, 37, 35
- In class we drew five samples from the "Blue 3 and
White 3" Machine to complete twenty samples of size six from the "Blue
3 and White 3" Machine. Do an R and (if appropriate) an X-bar chart.
Finish the histogram for X and X-bar. If appropriate estimate the mean
and standard deviation of X. The five samples selected in class were:
- 20, 16, 19, 36, 35, 36
- 18, 18, 18, 32, 32, 34
- 18, 24, 23, 34, 33, 36
- 22, 20, 18, 35, 39, 36
- 20, 15, 19, 31, 35, 37
- In class we drew five samples from the "Blue, White
Mixture" Machine to complete twenty samples of size six from the "Blue,
White Mixture" Machine. Do an R and (if appropriate) an X-bar chart.
Finish the histogram for X and X-bar. If appropriate estimate the mean
and standard deviation of X. The five samples selected in class were:
- 20, 33, 20, 34, 19, 34
- 37, 19, 21, 35, 38, 34
- 23, 22, 34, 35, 36, 22
- 21, 37, 19, 36, 34, 35
- 36, 34, 33, 19, 33, 18
- Compare and contrast the R and X-bar charts and histograms
in steps 3 and 4.
- Do you notice anything unique about the X-bar chart in
Step 3 (compared to the other 3 X-bar charts)?
Class 10 (February 19, 1998)
Introduction to Variable Data
- Read the following hand-out "Rationale
for X-bar/R Chart in a Filling Operation"
- Do the "Resistor" homework that is at the end
of today's lecture notes. Be prepared to discuss your answer in the class
of Tuesday, February 24.
- Do the "Moisture Content of Reel Samples" homework
that is at the end of today's lecture notes. Be prepared to discuss your
answer in the class of Tuesday, February 24.
Class 9 (February 12, 1998)
Review
- Exam 1 is Tuesday, February 17. The exam is closed notes,
but you may have one sheet of notes, the textbook and your "appendix".
You may not use the course packet during the exam.
- Write the operational definition for the class
project . Due Thursday, February 19.
Class 8 (February 10, 1998)
Process Analysis Using c and u Charts
- Do the Supplemental Exercises for Packet 1. Check yourself
with the solutions provided at the end of the exercises. Be prepared to
ask questions in class on any doubts you might still have.
Class 7 (February 5, 1998)
c and u Charts (Continued)
Class 6 (February 3, 1998)
Introduction to c and u Charts
- Do the "Missing Rivets" homework which is among
today's lecture notes. Be prepared to discuss your answer in the class
of Thursday, February 5.
- Do the "Integrated Circuits" homework which
is among today's lecture notes. Be prepared to discuss your answer in the
class of Thursday, February 5.
- Do the "Beer Can" homework which is among today's
lecture notes. Be prepared to discuss your answer in the class of Thursday,
February 5.
- Do the "Particle Board" homework which is among
today's lecture notes. Be prepared to discuss your answer in the class
of Thursday, February 5.
- Write the proposal for the class
project . Due Tuesday, February 10.
- Play "Let's
Make a Deal" by clicking on this link. Should you switch doors
or not? Why? Read more on Let's
Make a Deal by following this link
Class 5 (January 29, 1998)
p-chart with Varying n /
Pareto Charts, Fishbone Diagrams and
Process Flow Diagrams
- Do the "Label Application Process" homework
which is among today's lecture notes. Be prepared to discuss your answer
in the class of Tuesday, February 3.
Class 4 (January 27, 1998)
Decisions Related to Any Control Chart/
Bead Box Experiment
- Do the motor shaft homework which is among today's lecture
notes. Be prepared to discuss your answer in the class of Thursday, January
28.
Class 3 (January 22, 1998)
Type I and II Errors. Runs Tests
- Perform runs tests on the chart on page "p, np-Chart
Example-2"
- Will the results of the runs tests applied to the chart
on page "p, np-Chart Example-5" be any different than the problem
above?
- Perform runs tests on all appropriate charts in the "p,
np-Chart Homework" section.
- Based on the results of the runs tests applied to problem
number 2 in the "p, np-Chart Homework" section, does your response
to part (c) of this problem change? If so, what is your answer to part
(c) now?
Class 2 (January 20, 1998)
p and np Charts / Operational Definitions
- Do problems 1, 2, and 3 at the end of the notes used
in today's lecture. Be prepared to discuss your answer in the class of
Thursday, January 22
Class 1 (January 15, 1998)
General Introduction
- Familiarize yourself with this course home page
Course home
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