Watch Corporation of Switzerland claims that its watches on
average will neither gain nor lose time...
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Watch Corporation of Switzerland claims that its watches onaverage will neither gain nor lose time during a week. A sample of18 watches provided the following gains (+) or losses (−) inseconds per week.
−0.43
−0.22
−0.42
−0.37
+0.27
−0.23
+0.32
+0.54
−0.19
−0.29
−0.34
−0.55
−0.44
−0.56
−0.05
−0.19
−0.24
+0.08
Compute the value of the test statistic. (Negativeamount should be indicated by a minus sign. Round your answer to 3decimal places.)
Is it reasonable to conclude that the mean gain or loss in timefor the watches is 0? Use the 0.01 significance level.
Estimate the p-value.
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