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. Is it reasonable to conclude that the mean gain or loss in time for the watches is 0?

0.10

0.40

0.40

-0.32

0.20

-0.23

0.10

0.25

-0.10

-0.37

-0.61

0.00

-0.10

-0.64

0.00

-0.40

-0.68

-0.40

(a)State the decision rule for 0.02 significance level.

• (Negative amounts should be indicated by a minus sign)
• (Round your answers to 3 decimal places)

RejectH₀: = 0 ift

ort>???

(b)Compute the Value of the test statistic.

• (Negative amount should be indicated by a minus sign)
• (Round your answer to 2 decimal places)

Test Statistic t=???

(c)What is your decision regarding the null hypothesis?

Answer

Cannot Reject Ho or Reject Ho

Therefore the evidence supports the claim that H0: = 0 or H0: 0