To protect against earthquake damage, steel beams are typically fitted and connected with plastic hinges. However, these plastic hinges are prone to deformations and are difficult to inspect and repair. An alternative method of connecting steel beams-one that uses high-strength steel bars with clamps-was investigated. Mathematical models for predicting the performance of these steel connecting bars assume the bars have a mean yield strength of 300 megapascals (MPa). To verify this assumption, the researchers conducted material property tests on the steel connecting bars. In a sample of three tests, the yield strengths were 357, 371, and 361 MPa. Do the data indicate that the true mean yield strength of the steel bars exceeds 300 MPa? Test using a = 0.01. E Click the icon to view the Student t-distribution table. O B. Ho: H#300 Ha:H= 300 O D. Ho:H= 300 Ha: H#300 O A. Ho: H= 300 Ha:H<300 C. Ho: H= 300 Ha: H> 300 Compute the value of the test statistics. t = 15.13 (Round to two decimal places as needed.) Determine the rejection region for this test. Choose the correct answer below and fill in the answer box(es) to complete your choice. (Round to three decimal places as needed.) O A. The rejection region is t< or t> O B. The rejection region is O D. The rejection region ist<
To protect against earthquake damage, steel beams are typically fitted and connected with plastic hinges. However, these plastic hinges are prone to deformations and are difficult to inspect and repair. An alternative method of connecting steel beams-one that uses high-strength steel bars with clamps-was investigated. Mathematical models for predicting the performance of these steel connecting bars assume the bars have a mean yield strength of 300 megapascals (MPa). To verify this assumption, the researchers conducted material property tests on the steel connecting bars. In a sample of three tests, the yield strengths were 357, 371, and 361 MPa. Do the data indicate that the true mean yield strength of the steel bars exceeds 300 MPa? Test using a = 0.01. E Click the icon to view the Student t-distribution table. O B. Ho: H#300 Ha:H= 300 O D. Ho:H= 300 Ha: H#300 O A. Ho: H= 300 Ha:H<300 C. Ho: H= 300 Ha: H> 300 Compute the value of the test statistics. t = 15.13 (Round to two decimal places as needed.) Determine the rejection region for this test. Choose the correct answer below and fill in the answer box(es) to complete your choice. (Round to three decimal places as needed.) O A. The rejection region is t< or t> O B. The rejection region is O D. The rejection region ist<
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:To protect against earthquake damage, steel beams are typically fitted and connected with plastic hinges. However, these plastic hinges are prone to deformations and are difficult to inspect and
repair. An alternative method of connecting steel beams-one that uses high-strength steel bars with clamps-was investigated. Mathematical models for predicting the performance of these steel
connecting bars assume the bars have a mean yield strength of 300 megapascals (MPa). To verify this assumption, the researchers conducted material property tests on the steel connecting
bars. In a sample of three tests, the yield strengths were 357, 371, and 361 MPa. Do the data indicate that the true mean yield strength of the steel bars exceeds 300 MPa? Test using a = 0.01.
Click the icon to view the Student t-distribution table.
O B. Ho: µ#300
Ha:H= 300
O A. Ho:H= 300
Ha: H<300
c. Ho: H= 300
Ha:H> 300
O D. Ho: H= 300
Ha:H#300
Compute the value of the test statistics.
t= 15.13 (Round to two decimal places as needed.)
Determine the rejection region for this test. Choose the correct answer below and fill in the answer box(es) to complete your choice.
(Round to three decimal places as needed.)
O A. The rejection region is t<
or t>
O B. The rejection region is
<t<
O C. The rejection region is t>
O D. The rejection region is t<
Click to select and enter your answer(s) and then click Check Answer.
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