Master of Business Administration in Management
STAT 500 Statistics for Managers
1. Applying Six Sigma total quality management technique learned in the course to your workplace, identify a product or service whose quality needs to be monitored and controlled. (20 %)
a) Set up control chart(s) for the product or service studied.
b) On the basis of your results, indicate whether the process is in control.
c) What is your recommended policy if the process is in control or NOT in control?
7. A large mail-order house believes that there is an association between the weight of the mail it receives and the number of orders to be filled. It would like to investigate the relationship in order to predict the number of orders based on the weight of the mail. From an operational perspective, knowledge of the number of orders will help in the planning of the order-fulfillment process. A sample of 25 mails shipments is selected within a range of 200 to 700 pounds. The results are as follows: (20 %)
Weight of
Orders
Weight of
Orders
Weight of
Orders
Mail (lbs)
(in 0)
Mail (lbs)
(in 0)
Mail (lbs)
(in 0)
216
6.1
384
10.6
528
16.2
283
9.1
404
12.5
501
15.8
237
7.2
426
12.9
628
19
203
7.5
482
14.5
677
19.4
259
6.9
432
13.6
602
19.1
374
11.5
409
12.8
630
18
342
10.3
553
16.5
652
20.2
301
9.5
572
17.1
365
9.2
506
15
a) Assuming a linear relationship, use the least-squares method to find the regression coefficients, the vertical intercept and the slope.
b) Interpret the meaning of the vertical intercept and the slope.
c) Predict the average number of orders when the weight of the mail is 500 pounds.
d) Is your prediction in ( c ) reliable? Explain
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Credit:ivythesis.typepad.com
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