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INEN314 Homework #9
(Due 11/14)
The following problems are related to your experiments in Lab#8.
You need to use the data collected
from the Lab to finish this homework.
1.
Use the data from Step 4 in your Lab #8, construct a control chart (xbar chart and R chart) for 25
samples with a sample size of
n
=3, (a total of 75 recorded data) and a 3sigma control limit.
Show
your procedure and necessary intermediate results, such as how to determine
x
µ
,
x
σ
and what are
the values of the corresponding control limits. [5 pts]
2.
Did you find any out of control data points?
If you did, point out which one? Please also revise the
control limits.
Show the revised control limits and control charts. [4 pts]
3.
Use the control chart you constructed in (2) to monitor the 5 samples you obtained in Step 5, how
many out of control points you find?
Inspect those outofcontrol units, can you identify the reason
why they are out of control (i.e., their flight time is significantly different)? [3 pts]
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This note was uploaded on 09/01/2011 for the course ISEN 314 taught by Professor M during the Spring '10 term at Texas A&M.
 Spring '10
 M

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