Question 3: The table below shows the result of an experimental study conducted by a group of civil engineering students

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Question 3 The Table Below Shows The Result Of An Experimental Study Conducted By A Group Of Civil Engineering Students 1 (58.28 KiB) Viewed 23 times

Question 3: The table below shows the result of an experimental study conducted by a group of civil engineering students on the coefficient of thermal expansion (a) of a steel structure. Temperature 60 50 40 30 20 10 0 ] -10-20-30-40-50-60 a mm/mm°C 7.3 72 716.8 6.6, 5.4 63 6.2 60 5.9 5.7 5.5 5.3 (a) Draw a scatter diagram of the coefficient of thermal expansion (a) against temperature (T). Comment the plot and suggest an equation that seems appropriate in relating a to T? [30%) (6) Using linear regression to determine the relation between thermal expansion and the temperature, [40%) (C) Using the regression equation from (b) to calculate the regression residuals for each experimental point and construct a run chart plot for these residuals. Discuss the residual plot commenting on relevant features [30%]