Unformatted text preview: Process 3 manufactured 9 defective units in
150 items. At a significance level of .05, the management wants to perform a hypothesis test
to determine whether the quality of items produced appears to be independent of the
production process used. What is the rejection point condition?
A. Reject H0 if χ2 > .10257
B. Reject H0 if χ2 > 9.3484
C. Reject H0 if χ2 > 5.99147
D. Reject H0 if χ2 > 7.37776
E. Reject H0 if χ2 > 7.81473 11042 Chapter 01  An Introduction to Business Statistics 34. A manufacturing company produces part 2205 for the aerospace industry. This particular
part can be manufactured using 3 different production processes. The management wants to
know if the quality of the units of part 2205 is the same for all three processes. The production
supervisor obtained the following data: Process 1 had 29 defective units in 240 items; Process
2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective units in
150 items. At a significance level of .05, the management wants to perform a hypothesis test
to determine whether the quality of items produced appears to be independent of the
production process used. Calculate the expected number of defective units produced by
Process 1.
A. 29
B. 21.053
C. 218.947
D. 6.042
E. 10.786 35. A manufacturing company produces part 2205 for the aerospace industry. This particular
part can be manufactured using 3 different production processes. The management wants to
know if the quality of the units of part 2205 is the same for all three processes. The production
supervisor obtained the following data: Process 1 had 29 defective units in 240 items; Process
2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective units in
150 items. At a significance level of .05, the management wants to perform a hypothesis test
to determine whether the quality of items produced appears to be independent of the
production process used. Calculate the expected number of conforming units produced by
Process 2.
A. 15.789
B. 168
C. 180
D. 164.211
E. 83.076 11043 Chapter 01  An Introduction to Business Statistics 36. A manufacturing company produces part 2205 for the aerospace industry. This particular
part can be manufactured using 3 different production processes. The management wants to
know if the quality of the units of part 2205 is the same for all three processes. The production
supervisor obtained the following data: The Process 1 had 29 defective units in 240 items;
Process 2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective
units in 150 items. At a significance level of .05, the management wants to perform a hypothesis test to
determine if the quality of the items produced appears to be independent of the production
process used. Based on the results summarized in the MegaStat/Excel output provided in the
table above, we:
A. Reject H0 and conclude that the quality of the product is not the same for all processes.
B. Reject H0 and conclude that the quality of the product is dependent on the manufacturing
process.
C. Failed to reject H0 and conclude that the quality of the product does not significantly differ
among the three processes.
D. Failed to reject H0 and conclude that the quality of the product is not the same for all
processes.
E. Reject H0 and conclude that the quality of the product is independent of the manufacturing
process used. 11044 Chapter 01  An Introduction to Business Statistics 37. A manufacturing company produces part 2205 for the aerospace industry. This particular
part can be manufactured using 3 different production processes. The management wants to
know if the quality of the units of part 2205 is the same for all three processes. The production
supervisor obtained the following data: The Process 1 had 29 defective units in 240 items;
Process 2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective
units in 150 items. At a significance level of .10, the management wants to perform a hypothesis test to
determine if the quality of the items produced appears to be independent of the production
process used. Based on the results summarized in the MegaStat/Excel output provided in the
table above, we:
A. Reject H0 and conclude that the quality of the product is not the same for all processes.
B. Reject H0 and conclude that the quality of the product is dependent on the manufacturing
process.
C. Failed to reject H0 and conclude that the quality of the product does not significantly differ
among the three processes.
D. Reject H0 and conclude that the quality of the product is independent of the production
process utilized.
E. Both A and B are correct. 11045 Chapter 01  An Introduction to Business Statistics 38. A real estate company is analyzing the selling prices of residential homes in a given
community. 140 homes that have been solved in the past month are randomly selected and
their selling prices are recorded. The statistician working on the project has sta...
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