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8. To decide whether two different types of steel have the same true average fracture toughness...
To decide whether two different types of steel have the same true average fracture toughness values,...
To decide whether two different types of steel have the same true average fracture toughness values, n specimens of each type are tested, yielding the following results. Type Sample Average 60.6 60.4 Sample SD 1.0 1.0 Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n = 100. (Round your answer to four decimal places.) Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n =...
To decide whether two different types of steel have the same true average fracture toughness values,...
To decide whether two different types of steel have the same true average fracture toughness values, n specimens of each type are tested, yielding the following results. Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n 100. (Round your answer to four decimal places.) Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n- 400. (Round your answer to four decimal places.) Is the small...
An experiment was performed to compare the fracture toughness of high-purity 16 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 16 Ni maraging steel with commercial purity steel of the same type Form 30 specimens, the sample average toughness was x = 65.4 for the high-purity steel, whereas for n - 39 specimens of commercial steel y = 59.9. Because the high-punity to is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial purity steel by more than...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. For m = 30 specimens, the sample average toughness was x = 65.5 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 59.9. Because the high-purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. Form 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than 5....
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 64.2 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 58.5. Because the high-purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. For m = 31 specimens, the sample average toughness was x = 65.3 for the high-purity steel, whereas for n = 38 specimens of commercial steel y = 59.5. Because the high-purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than...
SECTION A Q1. (a) The standards for testing the fracture toughness of materials define the shape...
SECTION A Q1. (a) The standards for testing the fracture toughness of materials define the shape and proportion of the specimens but not their size. Explain why this is and why it is necessary to use specimens of different sizes for these tests. [5 marks] (b) You are testing samples of steel with a yield stress of 1200 MPa. Initial results show that the fracture toughness is 120 MPavm. The specimens are 10 mm thick. Determine whether the specimens are...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by...
To decide whether two different types of steel have the same true average fracture toughness values, n specimens of each type are tested, yielding the following results. Type Sample Average 60.6 60.4 Sample SD 1.0 1.0 Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n = 100. (Round your answer to four decimal places.) Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n =...
To decide whether two different types of steel have the same true average fracture toughness values, n specimens of each type are tested, yielding the following results. Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n 100. (Round your answer to four decimal places.) Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n- 400. (Round your answer to four decimal places.) Is the small...
An experiment was performed to compare the fracture toughness of high-purity 16 Ni maraging steel with commercial purity steel of the same type Form 30 specimens, the sample average toughness was x = 65.4 for the high-purity steel, whereas for n - 39 specimens of commercial steel y = 59.9. Because the high-punity to is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial purity steel by more than...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. Form 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than 5....
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 64.2 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 58.5. Because the high-purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial-purity steel of the same type. For m = 31 specimens, the sample average toughness was x = 65.3 for the high-purity steel, whereas for n = 38 specimens of commercial steel y = 59.5. Because the high-purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by more than...
SECTION A Q1. (a) The standards for testing the fracture toughness of materials define the shape and proportion of the specimens but not their size. Explain why this is and why it is necessary to use specimens of different sizes for these tests. [5 marks] (b) You are testing samples of steel with a yield stress of 1200 MPa. Initial results show that the fracture toughness is 120 MPavm. The specimens are 10 mm thick. Determine whether the specimens are...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by...
An experiment was performed to compare the fracture toughness of high-purity 18 Ni maraging steel with commercial purity steel of the same type. For m = 34 specimens, the sample average toughness was x = 63.1 for the high-purity steel, whereas for n = 39 specimens of commercial steel y = 57.3. Because the high- purity steel is more expensive, its use for a certain application can be justified only if its fracture toughness exceeds that of commercial-purity steel by...
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