1.

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 f23 428 222.5 531 529 4If μ is the mean strength of the specimens and σ is the standard deviation the number of specimens (out of 20) with compressive strength less than μ−3σ is ________.0

Answer» 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 5

31 5

29 4



If μ is the mean strength of the specimens and σ is the standard deviation the number of specimens (out of 20) with compressive strength less than μ3σ is ________.
  1. 0


Discussion

No Comment Found

Related InterviewSolutions