The frequency distribution of the compressive strength of 20 concrete cube specimens is given in the table, f(MPa) Number of specimens with compressive strength equal to f
The frequency distribution of the compressive strength of 20 concrete cube specimens is given in the table, f(MPa) Number of specimens with compressive strength equal to f
Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter11: Fracture And Fatigue
Section: Chapter Questions
Problem 11.4P
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Question
![The frequency distribution of the compressive
strength of 20 concrete cube specimens is given
in the table,
f(MPa)
Number of specimens with
compressive strength equal to f
23
4
28
2
22.5
31
29
4
If uis the mean strength of the specimens and
o is the standard deviation the number of
specimens (out of 20) with compressive strength
less than u-3o is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdf83d2a1-d0b0-46fe-a43b-9de2cc5dc417%2F64774b2c-e16a-4ce6-9bee-532b9e867bf8%2F8z8dz9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The frequency distribution of the compressive
strength of 20 concrete cube specimens is given
in the table,
f(MPa)
Number of specimens with
compressive strength equal to f
23
4
28
2
22.5
31
29
4
If uis the mean strength of the specimens and
o is the standard deviation the number of
specimens (out of 20) with compressive strength
less than u-3o is
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