olex claims that its watches on average will neither gain nor lose time during a week. A sample of 18 watches provided the following gains (+) or losses (−) in seconds per week. Seconds -0.32 -0.20 -0.38 -0.32 0.32 -0.23 0.30 0.25 -0.25 -0.31 -0.61 -0.48 -0.47 -0.44 -0.04 -0.20 -0.68 0.05 Is it reasonable to conclude that the mean gain or loss in time for the watches is 0? Use the .05 significance level. Based on the information above, find the Test statistics? -2.1098 2.1098 -3.197 0.0698

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