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BUSI 3303
Assignment
10
Instructions:
1. Please
answer the assignment questions in this docx file and save once youâre
satisfied. Assignment 10 accounts for 5% of the final grade.
2. There are
assignment problems. Please pay attention to the instructions
given at the end of each question in Bold.
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Assignment Problems (70 points in total):
Chapter 14.2, Method 3 (24 points in total)
Twenty-five
samples of 100 items each were inspected when a process was considered to be
operating satisfactorily. In the 25 samples, a total of 135 items were found to
be defective.
a. What is the
estimate of the population proportion defective? Please provide at least one step of calculation and the correct answer
for full credit. (4 points)
b. What is the
standard error of the proportion defective? Please provide the formula, at least one step of calculation, and the
correct answer for full credit. (6
points)
c. Compute the
UCL and the LCL for the control chart using the 3 sigma rule. For each control limit, please provide the
formula, at least one step of calculation, and the correct answer full credit.
(14 points)
Chapter 14.2, Application 7(46 points in total;
Questions are changed)
The Goodman Tire
and Rubber Company periodically tests its tires for tread wear under simulated
road conditions. To study and control the manufacturing process, 20 samples,
each containing three radial tires, were chosen from different shifts over
several days of operation, with the following results. Assuming that these data
were collected when the manufacturing process was believed to be operating in
control, develop the R and.png"> (check
excel)
a. Compute the
mean of all sample means and the mean range of the samples. For each statistic, please provide at least
one step of calculation and the correct answer for full credit. (8 points)
b. For the.png">chart,
compute the UCL and the LCL. Refer to Table 14.3 of the
textbook for the factor values.For
each control limit, please provide the formula, at least one step of
calculation, and the correct answer full credit. (12
points)
b. Plot the 20
sample means on the.png">chart
with control limits. Please have the 20
sample means, the two control limits, and the central line on the chart. (10
points)
c. Are there any
samples out of control based on the.png">chart? (4 points)
d. For the.png">chart,
compute the UCL and the LCL. Refer to Table 14.3 of the
textbook for the factor values.For
each control limit, please provide the formula, at least one step of
calculation, and the correct answer full credit. (12
points)
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