The article "Modeling Resilient Modulus and Temperature Correction for Saudi Roads" (H. Wahhab, I. Asi, and R. Ramadhan, Journal of Materials in Civil Engineering, 2001:298-305) describes a study designed to predict the resilient modulus of pavement from physical properties. One of the questions addressed was whether the modulus differs between rutted and nonrutted pavement. Measurements of the resilient modulus at 40—¦C (in 106 kPa) are presented below for 5 sections of rutted pavement and 9 sections of nonrutted pavement.

Perform a hypothesis test to determine whether it is plausible that the mean resilient modulus is the same for rutted and nonrutted pavement. Compute the P-value. What do you conclude?

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Rutted: 148 188 1.90 1.29 1.00 Nonrutted: 3.06 2.58 1.70 2.44 2.03 1.76 2.86 2.82 1.04