Week 4 Exercises

Week 4 Exercises

(STBE) Chapter 7- 42

The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution.

a. Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?

34%

b. What percent of the garages take between 29 hours and 34 hours to erect?

77%

c. What percent of the garages take 28.7 hours or less to erect?

45%

d. Of the garages, 5 percent take how many hours or more to erect?

(RMB) Chp 3 – Practice Research Plan

Practice Research Plan – Practice research planning by doing the following:

Generate a simple five-part research plan for the research scenario we did in W1 that involved answering the company president’s question, “Which of the two production lines is performing better? One challenge in this research plan is determining how to collect the yield data calculated at the end of every shift without “frightening” the workers into overdrive efforts because they think they are being watched.

1. Which production line is better, line A or line B.

2. Daily yield will be collected from each line for a total of 7 days. It will be collected at the end of each day.

3. Data will be analyzed by the good product separated from the bad product.

4. Schedule will consist of 7 days production analysis of the 2 lines.

5. Research will show what each production line yields are, and therefore show what production line is performing better.

Generate a simple five-part research plan for a research scenario that utilizes survey questions to collect data, for example, like the example we discussed in class about standardizing a company’s...