5. Radon Expose in Egyptian Tombs Many ancient Egyptian tombs were cut from limestone rock that contained uranium. Since most tombs are not well ventilated, guards, tour guides, and visitors may be exposed to deadly radon gas. In Radiation Protection Dosimetry (December 2010), a study of radon exposure in tombs in the Valley of Kings, Luxor, Egypt (recently opened for public tours), was conducted. The radon levelsmeasured in becquerels per cubic meter (Bq/m*)-in the inner chambers of a sample of 12 tombs were determined. Summary statistics follow: T = 3,643 Bq/m3 and s = 4, 487 Bq/m. For the safety of the guards and visitors, the Egypt Tourism Authority (ETA) will temporarily close the tombs if the true mean level of radon exposure in the tombs rises to 6,000 Bq/m³. Conduct a test to determine if the true mean level of radon exposure in the tombs is LESS THAN 6,000 Bq/m, using a Type I error probability of 0.04. You may assume that the radon levels in the tombs in the Valley of Kings are normally distributed. (Complete Parts (a), (b), and (c).) (a) The value of the test statistic (rounded to two decimal places) is (i) 1.63 (ii) -1.82 (iii) 1.13 (iv) -2.41 (b) The p-value (rounded to three decimal places) is (i) 0.068 (ii) 0.034 (iii) 0.048 (iv) 0.096 (c) Based on your answer to Part (b), (i) Do not recommend that ETA temporarily close the tombs, since there is not sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m. (ii) Recommend that ETA temporarily close the tombs, since there is not sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m3. (iii) Recommend that ETA temporarily close the tombs, since there is sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m. (iv) Do not recommend that ETA temporarily close the tombs, since there is sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m3.

5. Radon Expose in Egyptian Tombs Many ancient Egyptian tombs were cut from limestone rock that contained uranium. Since most tombs are not well ventilated, guards, tour guides, and visitors may be exposed to deadly radon gas. In Radiation Protection Dosimetry (December 2010), a study of radon exposure in tombs in the Valley of Kings, Luxor, Egypt (recently opened for public tours), was conducted. The radon levelsmeasured in becquerels per cubic meter (Bq/m*)-in the inner chambers of a sample of 12 tombs were determined. Summary statistics follow: T = 3,643 Bq/m3 and s = 4, 487 Bq/m. For the safety of the guards and visitors, the Egypt Tourism Authority (ETA) will temporarily close the tombs if the true mean level of radon exposure in the tombs rises to 6,000 Bq/m³. Conduct a test to determine if the true mean level of radon exposure in the tombs is LESS THAN 6,000 Bq/m, using a Type I error probability of 0.04. You may assume that the radon levels in the tombs in the Valley of Kings are normally distributed. (Complete Parts (a), (b), and (c).) (a) The value of the test statistic (rounded to two decimal places) is (i) 1.63 (ii) -1.82 (iii) 1.13 (iv) -2.41 (b) The p-value (rounded to three decimal places) is (i) 0.068 (ii) 0.034 (iii) 0.048 (iv) 0.096 (c) Based on your answer to Part (b), (i) Do not recommend that ETA temporarily close the tombs, since there is not sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m. (ii) Recommend that ETA temporarily close the tombs, since there is not sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m3. (iii) Recommend that ETA temporarily close the tombs, since there is sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m. (iv) Do not recommend that ETA temporarily close the tombs, since there is sufficient evidence that the true mean level of radon exposure in the tombs is less than 6,000 Bq/m3.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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