In Los Angeles, doctors carried out an experiment in which 105 sedentary people whose arteries were photographed were given a photograph of the inside of their arteries to carry around. Another 105 people for whom the same medical procedure was performed were not given a photograph to take with them. After 6 months, the photo group had lost an average of 17.6 pounds, while the nonphoto group had lost an average of 11.0 pounds. Assume that data file XR11013 contains the weight loss for members of each group. In a suitable one-tail test at the 0.05 level, was the mean weight loss for the photo group significantly greater than for the nonphoto group? Identify and interpret the p-value for the test.