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[15 pts.]

1.

Use the data file FLAMERTD.MTW to test whether Coating affects fabric Flammability.  In this case consider both types of coating as well as no coating.   Interpret your results.  Make sure to include and interpret the confidence interval plot for the means.

[15 pts.]

2.

Use the data file CIRCUIT.MTW to determine if reliability (number of weeks of service before failure) depends on failure mode.  Interpret your results.  Make sure to include and interpret the confidence interval plot for the means.


[15 pts.]

3.

Use the data file CARPET.MTW to test whether Composition and Type of carpet affect durability.  Interpret your results. 


[15 pts.]

4.

Measurement System Analysis (MSA) is used to determine whether the measurements made on quality characteristics are consistent.  The most common MSA is gauge repeatability and reproducibility analysis (or Gauge R&R).  Use the data file GAGE2.MTW and perform ANOVA to determine if there is significant variation in measurements based on Part or Operator.  What conclusion would you make about the consistency of measurements?

[15 pts.]

5.

Use the data file PIPEDIAM.MTW to determine whether the Supplier of raw materials and the Production Line used affect the diameter of pipes.  Also include the interaction plot.  Interpret your results. 

[25 pts.]

6.

Use the data file YARN.MTW provided with the assignment.  An operations manager wants to examine the effect of three factors, air-jet pressure (in psi), side-to-side aspect (nozzle and opposite), and type of fiber (synthetic or natural) on the breaking strength of yarn.

  • Determine the effects of Aspect, Jet Pressure, and Fiber (and all possible interactions) on Strength.  Interpret your results.
  • Analyze these data using a Taguchi design.


OM 545: ASSIGNMENT #5: Experimental Design - ANOVA INSTRUCTIONS: Use MINITAB 17 to complete the following exercises. The data files come with Minitab unless otherwise noted as provided with the assignment . For the data files that come with Minitab, you can read the data set descriptions using the HELP command. Please submit your completed assignment, showing all relevant MINITAB output and comments, as ONE WORD document by the due date. This assignment is worth a total of 100 points. [15 pts.] Use the data file FLAMERTD.MTW to test whether Coating affects fabric Flammability . In this case consider both types of coating as well as no coating. Interpret your results. Make sure to include and interpret the confidence interval plot for the means. [15 pts.] Use the data file CIRCUIT.MTW to determine if reliability (number of weeks of service before failure) depends on failure mode. Interpret your results. Make sure to include and interpret the confidence interval plot for the means. [15 pts.] Use the data file CARPET.MTW to test whether Composition and Type of carpet affect durability. Interpret your results. [15 pts.] Measurement System Analysis (MSA) is used to determine whether the measurements made on quality characteristics are consistent. The most common MSA is gauge repeatability and reproducibility analysis (or Gauge R&R ). Use the data file GAGE2.MTW and perform ANOVA to determine if there is significant variation in measurements based on Part or Operator . What conclusion would you make about the consistency of measurements? [15 pts.] Use the data file PIPEDIAM.MTW to determine whether the Supplier of raw materials and the Production Line used affect the diameter of pipes. Also include the interaction plot. Interpret your results. [25 pts.] Use the data file YARN.MTW provided with the assignment. An operations manager wants to examine the effect of three factors, air-jet pressure (in psi), side-to- side aspect (nozzle and opposite), and type of fiber (synthetic or natural) on the breaking strength of yarn. (a) Determine the effects of Aspect , Jet Pressure , and Fiber (and all possible interactions) on Strength. Interpret your results. (b) Analyze these data using a Taguchi design.
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