Homework SourseConsider the accompanying data on flexural strength MPa for
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
(a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: xi = 219.3.] (Round your answer to three decimal places.)
MPa
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(b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%.
MPa
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(c) Calculate a point estimate of the population standard deviation . [Hint: xi2 = 1857.63.] (Round your answer to three decimal places.)
MPa
Answer=
(d) Calculate a point estimate of the proportion of all such beams whose flexural strength exceeds 10 MPa. [Hint: Think of an observation as a \"success\" if it exceeds 10.] (Round your answer to three decimal places.)
Answer=
(e) Calculate a point estimate of the population coefficient of variation /. (Round your answer to four decimal places.)
Answer=
| 6.8 | 7.2 | 8.5 | 7.0 | 7.8 | 8.1 | 10.7 |
| 5.1 | 11.8 | 6.3 | 9.7 | 9.7 | 7.7 | 6.5 |
| 7.4 | 7.3 | 9.0 | 8.2 | 8.7 | 11.6 | 7.7 |
| 7.2 | 6.8 | 7.9 | 6.3 | 11.3 | 7.0 |
Solution
