Watch Corporation of Switzerland 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. -.20 .20 -.40 -.32 .20 -.23 .00 .25 -.10
-.37 -.61 .10 -.30 -.64 .40 -.10 -.68 -.20
(a-1)
Is it reasonable to conclude that the mean gain or loss in time for the watches is 0? Use the .10 significance level. At a level of .10 significance, we reject H0: ? = 0 if t < or t > . (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)
(a-2)The value of the test statistic is . (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
(a-3 The p-value is .
a. between 0.02 and 0.05
b. between 0.05 and 0.1
c. greater than 0.2
d. between 0.1 and 0.2