Mathematics, 03.03.2020 06:03 DianaAmaroxoxo4319
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
7.3 6.8 8.6 9.7 11.6 9.7 6.8 7.7 11.8 7.4 8.1 8.7 6.3 7.9 7.0 7.9 7.8 6.5 6.3 7.0 7.5 7.7 7.2 11.3 9.0 10.7 5.1
(a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Σxi = 219.4.] (Round your answer to three decimal places.) State which estimator you used.
a) s b) x c) p? d) x tilde e) s / x
(b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%. State which estimator you used.
a) s b) x c) p? d) x tilde e) s / x
(c) Calculate a point estimate of the population standard deviation σ. [Hint: Σxi2 = 1858.92.] (Round your answer to three decimal places.)
Interpret this point estimate.
a. This estimate describes the center of the data.
b. This estimate describes the bias of the data.
c. This estimate describes the linearity of the data.
d. This estimate describes the spread of the data.
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Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
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