Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type. 7.9...

Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.

7.9	6.5	6.3	8.0	7.7	5.0	6.8
8.1	7.3	7.7	6.3	7.8	10.7	7.1
11.8	7.0	11.3	11.6	6.8	7.4	9.7
9.7	7.2	7.9	7.0	9.0	8.7

(a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Σx_i = 218.3.] (Round your answer to three decimal places.)
_________MPa

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

(c) Calculate a point estimate of the population standard deviation σ. [Hint: Σx_i² = 1842.11.] (Round your answer to three decimal places.)
___________MPa

(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 σ/μ. (Round your answer to four decimal places.)

Answer:

Expert Solution

orchestra answered 2 years ago

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

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