Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type. 11.8 6.3 8.1 6.5 7.9 6.8 7.4 7.3 7.2 9.7 6.8 7.7 9.0 7.8 10.7 8.0 11.6 7.7 7.0 5.9 9.7 8.7 6.3 8.7 7.3 11.3 7.0 (a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Ex, = 220.2.] (Round your answer to three decimal places.) MPa State which estimator you used. Os Ox Ox Os/x Op (b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%. MPa State which estimator you used. Ox Os/x Os Op 07 (c) Calculate a point estimate of the population standard deviation o. [Hint: Ex2 = 1868.08.] (Round your answer to three decimal places.) MPa Interpret this point estimate. O This estimate describes the bias of the data. O This estimate describes the center of the data. O This estimate describes the spread of the data. O This estimate describes the linearity of the data.
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type. 11.8 6.3 8.1 6.5 7.9 6.8 7.4 7.3 7.2 9.7 6.8 7.7 9.0 7.8 10.7 8.0 11.6 7.7 7.0 5.9 9.7 8.7 6.3 8.7 7.3 11.3 7.0 (a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Ex, = 220.2.] (Round your answer to three decimal places.) MPa State which estimator you used. Os Ox Ox Os/x Op (b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%. MPa State which estimator you used. Ox Os/x Os Op 07 (c) Calculate a point estimate of the population standard deviation o. [Hint: Ex2 = 1868.08.] (Round your answer to three decimal places.) MPa Interpret this point estimate. O This estimate describes the bias of the data. O This estimate describes the center of the data. O This estimate describes the spread of the data. O This estimate describes the linearity of the data.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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![Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
11.8 6.3 8.1 6.5 7.9 6.8 7.4
7.3 7.2
9.7 6.8
7.7 9.0 7.8
7.0 5.9 9.7
10.7 8.0 11.6 7.7
8.7 6.3
8.7 7.3 11.3 7.0
(a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Ex, = 220.2.] (Round your answer to three decimal places.)
MPa
State which estimator you used.
Os
Ox
O x
Os/x
O p
(b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%.
MPa
State which estimator you used.
Ox
Os/x
Os
O p
Ox
(c) Calculate a point estimate of the population standard deviation o. [Hint: Ex² = 1868.08.] (Round your answer to three decimal places.)
MPa
Interpret this point estimate.
O This estimate describes the bias of the data.
O This estimate describes the center of the data.
O This estimate describes the spread of the data.
O This estimate describes the linearity of the data.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feeb0cd63-fcaf-4f78-a653-01ec8225914a%2Fe0f8052d-affe-4c99-b564-73f6f5440817%2Fzrdud2_processed.png&w=3840&q=75)
Transcribed Image Text:Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
11.8 6.3 8.1 6.5 7.9 6.8 7.4
7.3 7.2
9.7 6.8
7.7 9.0 7.8
7.0 5.9 9.7
10.7 8.0 11.6 7.7
8.7 6.3
8.7 7.3 11.3 7.0
(a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Ex, = 220.2.] (Round your answer to three decimal places.)
MPa
State which estimator you used.
Os
Ox
O x
Os/x
O p
(b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%.
MPa
State which estimator you used.
Ox
Os/x
Os
O p
Ox
(c) Calculate a point estimate of the population standard deviation o. [Hint: Ex² = 1868.08.] (Round your answer to three decimal places.)
MPa
Interpret this point estimate.
O This estimate describes the bias of the data.
O This estimate describes the center of the data.
O This estimate describes the spread of the data.
O This estimate describes the linearity of the data.
![(c) Calculate a point estimate of the population standard deviation o. [Hint: Ex² = 1868.08.] (Round your answer to three decimal places.)
MPa
Interpret this point estimate.
O This estimate describes the bias of the data.
O This estimate describes the center of the data.
O This estimate describes the spread of the data.
O This estimate describes the linearity of the data.
Which estimator did you use?
O p
ox
OX
Os/X
Os
S
(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.)
(e) Calculate a point estimate of the population coefficient of variation o/u. (Round your answer to four decimal places.)
State which estimator you used.
O X
Ox
Os
Os/x
O p](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feeb0cd63-fcaf-4f78-a653-01ec8225914a%2Fe0f8052d-affe-4c99-b564-73f6f5440817%2Fo2djes_processed.png&w=3840&q=75)
Transcribed Image Text:(c) Calculate a point estimate of the population standard deviation o. [Hint: Ex² = 1868.08.] (Round your answer to three decimal places.)
MPa
Interpret this point estimate.
O This estimate describes the bias of the data.
O This estimate describes the center of the data.
O This estimate describes the spread of the data.
O This estimate describes the linearity of the data.
Which estimator did you use?
O p
ox
OX
Os/X
Os
S
(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.)
(e) Calculate a point estimate of the population coefficient of variation o/u. (Round your answer to four decimal places.)
State which estimator you used.
O X
Ox
Os
Os/x
O p
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