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Texas all lines adjuster exams questions and answers

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Use the information given below to answer the four (4) questions that follow: A quality engineer wants to verify that the thickness of metal strips produced in their rolling mills is 6 centimeters. ... The consistency of their thickness is very important to the companies purchasing these strips, for down-stream processing. The engineer drew a sample of 70 strips, and obtained the average sample thickness as 5.835, and the sample standard deviation as 1.23. Test the appropriate hypothesis at the 1% significance level. 1. What is the calculated value of the test statistic? A. .−0.165 B. –0.1342 C. 2.36 D. 1.01 E. – 1.12 * 2. At the 1% level of significance, where is the Reject Ho region? A. To the left of Z = -1.282 and to the right of Z = 1.282 B. To the left of Z = -1.645 and to the right of Z = 1.645 C. To the left of t = -1.328 and to the right of t = 1.328 D. To the right of Z = -2.576 and to the left of Z = 2.576 E. To the left of Z = -2.576 and to the right of Z = 2.576* 3. Assuming the calculated value of the test statistic is 3.00, what are the decision and conclusion of the test at the significance level of 0.01? A. Fail to reject the null hypothesis, conclude there is insufficient evidence that the thickness of the metal strips is not 6 centimeters. B. Reject the null hypothesis, conclude there is evidence that the thickness of the metal strips is not 6 centimeters.* C. Fail to reject the null hypothesis, conclude there is insufficient evidence that the thickness of the metal strips is 6 centimeters. D. Reject the null hypothesis, conclude there is insufficient evidence that the thickness of the metal strips is 6 centimeters. E. Reject the alternative hypothesis, conclude the mean strip thickness is not 5 centimeters. [Show More]

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