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The Ertl Company is well-known for its high-quality die-cast metal alloy toy replicas of tractors and other farm equipment. As part of a periodic procurement evaluation, Ertl is considering purchasing parts for a toy tractor line from three different suppliers. The parts received from the suppliers are classified as having a minor defect, having a major defect, or being good. Test results from samples of parts received from each of the three suppliers are shown below. Note that any test with these data is no longer a test of proportions for the three supplier populations because the categorical response variable has three outcomes: minor defect, major defect, and good. Supplier Part Tested A В Minor Defect 15 13 22 Major Defect 4 4 Good 129 126 122 Using the preceding data, conduct a hypothesis test to determine whether the distribution of defects is the same for the three suppliers. Use the chi-square test calculations as presented in this section with the exception that a table with r rows and c columns results in a chi-square test statistic with (r – 1)(c – 1) degrees of freedom. Find the value of the test statistic x2 (to 2 decimals) Use Table 3 of Appendix B to determine the p-value. The p-value is - Select your answer - Using a 0.05 level of significance, what is your conclusion? Conclude that we ar v - Select your answer - to reject the hypothesis that the population distribution of defects is the same for all three suppliers unable able

The Ertl Company is well-known for its high-quality die-cast metal alloy toy replicas of tractors and other farm equipment. As part of a periodic procurement evaluation, Ertl is considering purchasing parts for a toy tractor line from three different suppliers. The parts received from the suppliers are classified as having a minor defect, having a major defect, or being good. Test results from samples of parts received from each of the three suppliers are shown below. Note that any test with these data is no longer a test of proportions for the three supplier populations because the categorical response variable has three outcomes: minor defect, major defect, and good. Supplier Part Tested A В Minor Defect 15 13 22 Major Defect 4 4 Good 129 126 122 Using the preceding data, conduct a hypothesis test to determine whether the distribution of defects is the same for the three suppliers. Use the chi-square test calculations as presented in this section with the exception that a table with r rows and c columns results in a chi-square test statistic with (r – 1)(c – 1) degrees of freedom. Find the value of the test statistic x2 (to 2 decimals) Use Table 3 of Appendix B to determine the p-value. The p-value is - Select your answer - Using a 0.05 level of significance, what is your conclusion? Conclude that we ar v - Select your answer - to reject the hypothesis that the population distribution of defects is the same for all three suppliers unable able

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The Ertl Company is well-known for its high-quality die-cast metal alloy toy replicas of tractors and other farm equipment. As part of a periodic procurement evaluation, Ertl is considering purchasing parts for a toy tractor line from three different suppliers. The parts received from the suppliers are classified as having a minor defect, having a major defect, or being good. Test results from samples of parts received from each of the three suppliers are shown below. Note that any test with these data is no longer a test of proportions for the three supplier populations because the categorical response variable has three outcomes: minor defect, major defect, and good. Supplier Part Tested A В C Minor Defect 15 13 22 Major Defect 4 9. 4 Good 129 126 122 Using the preceding data, conduct a hypothesis test to determine whether the distribution of defects is the same for the three suppliers. Use the chi-square test calculations as presented in this section with the exception that a table with r rows and c columns results in a chi-square test statistic with (r – 1)(c – 1) degrees of freedom. Find the value of the test statistic x² (to 2 decimals) Use Table 3 of Appendix B to determine the p-value. The p-value is - Select your answer - Using a 0.05 level of significance, what is your conclusion? Conclude that we ar v - Select your answer - to reject the hypothesis that the population distribution of defects is the same for all three suppliers unable able
Transcribed Image Text:The Ertl Company is well-known for its high-quality die-cast metal alloy toy replicas of tractors and other farm equipment. As part of a periodic procurement evaluation, Ertl is considering purchasing parts for a toy tractor line from three different suppliers. The parts received from the suppliers are classified as having a minor defect, having a major defect, or being good. Test results from samples of parts received from each of the three suppliers are shown below. Note that any test with these data is no longer a test of proportions for the three supplier populations because the categorical response variable has three outcomes: minor defect, major defect, and good. Supplier Part Tested A В C Minor Defect 15 13 22 Major Defect 4 9. 4 Good 129 126 122 Using the preceding data, conduct a hypothesis test to determine whether the distribution of defects is the same for the three suppliers. Use the chi-square test calculations as presented in this section with the exception that a table with r rows and c columns results in a chi-square test statistic with (r – 1)(c – 1) degrees of freedom. Find the value of the test statistic x² (to 2 decimals) Use Table 3 of Appendix B to determine the p-value. The p-value is - Select your answer - Using a 0.05 level of significance, what is your conclusion? Conclude that we ar v - Select your answer - to reject the hypothesis that the population distribution of defects is the same for all three suppliers unable able
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