Calculate a point estimate of the mean value of strength of all beams manufactured in this fashion and state which estimator you used. (Hint: E; X; = 76.5) Calculate a point estimate of the population standard deviation o. Which esti- mator did you use? (Hint: E, X? = 752.89) Calculate a point estimate of the proportion of all such beams whose flexural strength exceeds 10.5 Mpa.

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The following data was collected for the flexural strength for concrete beams:
10.6, 9.8, 7.9, 8.2, 8.5, 9.3, 13.3, 8.9
a. Calculate a point estimate of the mean value of strength of all beams manufactured
in this fashion and state which estimator you used. (Hint: E; X; = 76.5)
b. Calculate a point estimate of the population standard deviation o. Which esti-
mator did you use? (Hint: E; X? = 752.89)
c. Calculate a point estimate of the proportion of all such beams whose flexural
strength exceeds 10.5 Mpa.
d. Calculate a point estimate of the strength value that separates the weakest 50%
of all such beams from the strongest 50%, and state which estimator you used.
Transcribed Image Text:The following data was collected for the flexural strength for concrete beams: 10.6, 9.8, 7.9, 8.2, 8.5, 9.3, 13.3, 8.9 a. Calculate a point estimate of the mean value of strength of all beams manufactured in this fashion and state which estimator you used. (Hint: E; X; = 76.5) b. Calculate a point estimate of the population standard deviation o. Which esti- mator did you use? (Hint: E; X? = 752.89) c. Calculate a point estimate of the proportion of all such beams whose flexural strength exceeds 10.5 Mpa. d. Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%, and state which estimator you used.
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