Civil engineers have developed a 3D model to predict the response of jointed concrete pavement to temperature variations (The International Journal of Pavement Engineering, September 2004). To validate the model, model predictions were compared with field measurements on key concrete stress variables taken at a newly constructed highway. One variable measured was slab top transverse strain (i.e., change in length per unit length per unit time) at a distance of 1 meter from the longitudinal joint. The 5-hour changes (8:20P.M to 1:20A.M.) in slab top transverse strain for 6 days are listed in the table below. Analyze the data using a nonparametric test. Is there a shift in the change in transverse strain distributions between field measurements and the 3D model? Test using α = .05.

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Change in Transverse Strain Change in Temperature (°C) Field 3D Model Day Measurement Oct. 24 -6.3 13.2 3.3 -14.8 -58 69 35 -32 -52 59 32 -24 Dec. 3 Dec. 15 Feb. 2 Mar. 25 .7 -40 -83 -39 -71 May 24 -.2