A Study Reported Data on Y-Tensile Strength (MPa) $x _ { 1 }$

question 1

Essay

A study reported data on y-tensile strength (MPa), $x _ { 1 }$ = slab thickness (cm), $x _ { 2 }$ = load (kg), $x _ { 3 }$ = age at loading (days), and $x _ { 4 }$ = time under test (days) resulting from stress tests of n=9 reinforced concrete slabs. The results of applying the BE elimination method of variable selection are summarized in the accompanying tabular format. Explain what occurred at each step of the procedure.

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