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Curing times in days (x) and compressive strengths in MPa
Chapter 7, Problem 12E(choose chapter or problem)
Curing times in days \((x)\) and compressive strengths in MPa \((y)\) were recorded for several concrete specimens. The means and standard deviations of the x and y values were \(\overline x=5\), \(s_x=2\), \(\overline{y}=1350\), \(s_y=100\). The correlation between curing time and compressive strength was computed to be \(r=0.7\). Find the equation of the least-squares line to predict compressive strength from curing time.
Equation Transcription:
Text Transcription:
(x)
(y)
overline{x}=5
s_x=2
overline{y}=1350
s_y=100
r=0.7
Questions & Answers
QUESTION:
Curing times in days \((x)\) and compressive strengths in MPa \((y)\) were recorded for several concrete specimens. The means and standard deviations of the x and y values were \(\overline x=5\), \(s_x=2\), \(\overline{y}=1350\), \(s_y=100\). The correlation between curing time and compressive strength was computed to be \(r=0.7\). Find the equation of the least-squares line to predict compressive strength from curing time.
Equation Transcription:
Text Transcription:
(x)
(y)
overline{x}=5
s_x=2
overline{y}=1350
s_y=100
r=0.7
ANSWER:
Step 1 of 2
It is given that for a regression analysis 