Question

Regression Methods were used to analyze the data from a study investigates the relationship between roadway surface temperature (Xi) and Pavement deflection (Yi). Summary quantities were n= 20, Sum of Yi

= ∑ Yi = 12.75, and ∑Yi² = 8.86, ∑Xi = 1478, ∑ Xi² = 143,215.8 and ∑ Xi Yi= 1083.67.

a) Calculate the Least Square (χ²);

b)estimates of slope and intercept set the line equation

c)Explain graph-Line of the regression line slope (+) or (-) and (0) if any?

Answer #1

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