Consider the accompanying data on flexural strength (MPa) for concrete beams of

Question

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

Answer=

(b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%.
MPa

Answer=

(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

Explanation / Answer

Consider the accompanying data on flexural strength (MPa) for concrete beams of

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